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BASIC ALGEBRA LESSONS

Whether needing help with basic algebra homework or reviewing for tests, Mr. X can help you, your child or your students better understand Basic Algebra. Our lessons are designed to reinforce the instructor's message. We also have a library of sample algebra problems with examples of solved problems for each basic algebra lesson. Check out our free samples below, as well as the basic algebra curriculum.

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Basic Algebra Sample Lesson 1

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Basic Algebra Sample Lesson 2

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Basic Algebra Sample Lesson 3

Basic Algebra Curriculum

Algebraic Expressions

Title Description
Pineapples Classic Lesson A Classic Lesson in learning how to write Algebraic Expressions. Play_video
Cake and Pie Classic Lesson A Classic Lesson in learning how to write Algebraic Expressions.
We may use either two variables or just one.
Play_video
Algebraic Notation You need a good understanding of a variable, as x. Play_video
Dr. X no Longer Operates At some point we need to leave the symbol for the operation of multiplication behind, as "X" has become a variable, and not a symbol to multiply. Play_video
A Bridge from Arithmetic to Algebra Part II Some simple problems lend themselves to solutions with both Arithmetic and Algebra. Visualizing these type of problems provide a bridge into the world of Basic Algebra. Play_video
Learning how to Setup an Algebraic Equation Our suggestion is to pick letters that represent something easily understood. In this example M represents the number of pineapples Mike begins with. L represents the number of pineapples that Laura has. Play_video
Equal Parts mean Equal Fractions These word problems can be solved with either Arithmetic or Algebra. Practice with fractions in word problems to learn how to write algebraically. Play_video
A Bridge from Arithmetic to Algebra Part I Some simple problems lend themselves to solutions with both Arithmetic and Algebra. Visualizing these type of problems provide a bridge into the world of Basic Algebra. Play_video
Adding Like Terms Terms combine when they have the same variables to the same powers. Play_video
Coefficients Add Efficiently To do algebra easily and effectively, understand that coefficients add efficiently. Play_video
Like Terms Reinforcement on combining like terms.
Terms combine when they have the same variables to the same powers.
Play_video
Negative Multiplication A Lesson on Handling Negative Multiplication with Algebraic Terms. Play_video
Sum Groups are Worth Joining Grouping terms according to the Associative Law is exceptionally easy to see. Play_video
Ignorance of the Law is No Excuse The Commutative Law and the Distributive Law are discussed. Play_video
Using Algebraic Notation A lesson in using Algebraic Notation and Evaluating Algebraic Expressions.
Understanding how to work with variables and equations is a key skill to succeed in an Algebra course.
Play_video
X is Handy, In (or Out) We evaluate algebraic expressions whether x is inside or outside parenthesis.
We use the distributive property when x is inside parenthesis.
Play_video

Basic Skills

Title Description
A Bridge from Arithmetic to Algebra Part I Some simple problems lend themselves to solutions with both Arithmetic and Algebra. Visualizing these type of problems provide a bridge into the world of Basic Algebra. Play_video
A Bridge from Arithmetic to Algebra Part II Some simple problems lend themselves to solutions with both Arithmetic and Algebra. Visualizing these type of problems provide a bridge into the world of Basic Algebra. Play_video
Learning how to Setup an Algebraic Equation Our suggestion is to pick letters that represent something easily understood. In this example M represents the number of pineapples Mike begins with. L represents the number of pineapples that Laura has. Play_video
Algebraic Notation You need a good understanding of a variable, as x. Play_video
Equal Parts mean Equal Fractions These word problems can be solved with either Arithmetic or Algebra. Practice with fractions in word problems to learn how to write algebraically. Play_video
Dr. X no Longer Operates At some point we need to leave the symbol for the operation of multiplication behind, as "X" has become a variable, and not a symbol to multiply. Play_video
Pineapples Classic Lesson A Classic Lesson in learning how to write Algebraic Expressions. Play_video
Cake and Pie Classic Lesson A Classic Lesson in learning how to write Algebraic Expressions.
We may use either two variables or just one.
Play_video
Arithmetic Operators We introduce the operators of arithmetic, the signs (or symbols) for addition, subtraction, multiplication, and division.
These are generally read "plus," "minus," "times," and "divided by," respectively.
We also officially introduce the equal sign.
Play_video
Using Algebraic Notation A lesson in using Algebraic Notation and Evaluating Algebraic Expressions.
Understanding how to work with variables and equations is a key skill to succeed in an Algebra course.
Play_video
X is Handy, In (or Out) We evaluate algebraic expressions whether x is inside or outside parenthesis.
We use the distributive property when x is inside parenthesis.
Play_video
Like Terms Reinforcement on combining like terms.
Terms combine when they have the same variables to the same powers.
Play_video
Negative Multiplication A Lesson on Handling Negative Multiplication with Algebraic Terms. Play_video
Ignorance of the Law is No Excuse The Commutative Law and the Distributive Law are discussed. Play_video
Adding Like Terms Terms combine when they have the same variables to the same powers. Play_video
Sum Groups are Worth Joining Grouping terms according to the Associative Law is exceptionally easy to see. Play_video
Coefficients Add Efficiently To do algebra easily and effectively, understand that coefficients add efficiently. Play_video
Percent of Change 2 Practice with the concepts of Percents and Percentages as we build a bride to Basic Algebra. Play_video
Percent of Change 1 A lesson that emphasizes building a bridge from Arithmetic to Algebra with an understanding of Percentage Calculations. Play_video

Equations

Title Description
X is the Unknown We begin with a variable representing a "fill-in-the-blank" to make a statement true. Play_video
Cancel my Policy, Please We may subtract the same value from each side of an equality and maintain the equality.
We may divide the same value (a factor) from each side of an equality and maintain the equality.
Play_video
X Fills in the Blank Don't let the concept of a variable throw you.
You just "fill in the blank" with what you already know.
Each "x" is unique to a math statement.
We do not use different values of x "in the same problem."
Play_video
One Good Idea Top to Bottom Dividing a fraction with like coefficients in the numerator and the denominator simplifies to unity.
This is used frequently when solving equations.
Play_video
X Can Be Anything The value that x stands for can be any value.
Typically, we seek the value for x the makes a statement true.
Play_video
One-Step Equations with Fractions, Lesson 1 We explain the logic and the procedures associated with moving fractions and a variable in an Algebraic Expression.
It's easy.
Play_video
Anything Goes with X Variables can be negative, positive, irrational, rational...
all kinds of things.
Anything goes...
Try to make the statement true.
A statement that is always true is called an identity.
Play_video

Equations

Title Description
X is the Unknown We begin with a variable representing a "fill-in-the-blank" to make a statement true. Play_video
X Fills in the Blank Don't let the concept of a variable throw you.
You just "fill in the blank" with what you already know.
Each "x" is unique to a math statement.
We do not use different values of x "in the same problem."
Play_video
Cancel my Policy, Please We may subtract the same value from each side of an equality and maintain the equality.
We may divide the same value (a factor) from each side of an equality and maintain the equality.
Play_video
One Good Idea Top to Bottom Dividing a fraction with like coefficients in the numerator and the denominator simplifies to unity.
This is used frequently when solving equations.
Play_video
X Can Be Anything The value that x stands for can be any value.
Typically, we seek the value for x the makes a statement true.
Play_video
Anything Goes with X Variables can be negative, positive, irrational, rational...
all kinds of things.
Anything goes...
Try to make the statement true.
A statement that is always true is called an identity.
Play_video
One-Step Equations with Fractions, Lesson 1 We explain the logic and the procedures associated with moving fractions and a variable in an Algebraic Expression.
It's easy.
Play_video
Square Roots and Absolute Values A review of square roots and absolute values.
Play_video
Solving Proportions We use all five types of proportion problems from Math-Aids.com.
Solve for the value of the unknown (or variable) that makes the statement true.
Play_video
A Lesson in Concentrations Parts per Million and Parts per Billion are explained in a way to let it soak in, as it were.
It is a very fluid idea.
Play_video

Exponents

Title Description
An Overview of Rules for Exponents We take a look at the Math-Aids handout for rules of exponents. Play_video
An Introduction to Negative Exponents An introduction to negative exponents.
We reference reciprocals without detail about them.
Play_video
A Lesson in Evaluating Exponential Functions We examine the nature of functions before we jump into the evaluation of Exponential Functions. Play_video
A Lesson with Functions Decreasing Exponentially Two basic problems for functions decreasing exponentially. Play_video
Multiplying with Exponents An introductory lesson for multiplication of terms with exponents. Play_video
Scientific Notation with Positive Exponents 2 This lesson in Scientific Notation uses only Positive Powers of Ten. Play_video
Scientific Notation with Negative Exponents 2 This lesson in Scientific Notation uses only Negative Powers of Ten. Play_video
Scientific Notation with Positive and Negative Powers A lesson in Scientific Notation discusses the difference between Positive Exponents and Negative Exponents. Play_video
Scientific Notation, Positive and Negative Exponents A lesson in Scientific Notation discusses the difference between Positive Exponents and Negative Exponents. Play_video
Scientific Notation with Positive and Negative Exponents A lesson where we multiply numbers in Scientific Notation with a little multiplication and a smidgen of addition. Play_video
Scientific Notation with both Positive and Negative Exponents We raise values expressed in Scientific Notation to both Positive Exponents and Negative Exponents. Play_video
Scientific Notation and Operations Mr. X does the HARD Long Division and the student gets the EASY Long Division. Play_video
Scientific Notation Operations We show all answers and work toward them.
As we do we emphasize that reliance on a calculator may not be entirely helpful.
Play_video

General Topics

Title Description
Adding Like Terms From a First Book in Algebra, 1895, by Wallace C.
Boyden.
Terms combine when they have the same variables to the same powers.
Play_video
Algebraic Notation From A First Book in Algebra, Wallace C.
Boyden, 1895.
You need a good understanding of a variable, as x.
Play_video
Algebraic Notation, many terms From A First Book in Algebra, Wallace C.
Boyden, 1895.
Take your time and understand the nature of a variable, as x.
Play_video
An Interesting Relationship, with Algebra From our multiplication table, an interesting relationship between arithmetic and algebra.
We observe that x² - 1 = (x-1)(x+1), or, x² = (x-1)(x+1) + 1.
Play_video
Arithmetic within Functions We may do basic arithmetic operations within and between functions. Play_video
Basic Algebra Lesson 01 - X is the Unknown We begin with a variable representing a "fill-in-the-blank" to make a statement true. Play_video
Basic Algebra Lesson 02 - X Fills in the Blank Don't let the concept of a variable throw you.
You just "fill in the blank" with what you already know.
Each "x" is unique to a math statement.
We do not use different values of x "in the same problem."
Play_video
Basic Algebra Lesson 03 - X Can Be Anything The value that x stands for can be any value.
Typically, we seek the value for x the makes a statement true.
Play_video
Basic Algebra Lesson 04 - Anything Goes Variables can be negative, positive, irrational, rational...
all kinds of things.
Anything goes...
Try to make the statement true.
A statement that is always true is called an identity.
Play_video
Basic Algebra Lesson 05 - One Good Idea Top to Bottom Dividing a fraction with like coefficients in the numerator and the denominator simplifies to unity. Play_video
Basic Algebra Lesson 06 - Coefficients Add Efficiently To do algebra easily and effectively, understand that coefficients add efficiently. Play_video
Basic Algebra Lesson 07 - Dr. X Can No Longer Operate At some point we need to leave the symbol for the operation of multiplication behind, as "X" has become a variable, and not a symbol to multiply. Play_video
Basic Algebra Lesson 08 - X is Handy, In (or Out) X is a handy thing, whether it is inside or outside of parentheses. Play_video
Basic Algebra Lesson 09 - Sum Groups are Worth Joining Grouping terms according to the Associative Law is exceptionally easy to see. Play_video
Basic Algebra Lesson 10 - Ignorance of the Law is No Excuse The Commutative Law and the Distributive Law are discussed. Play_video
Basic Algebra Lesson 11 - One Identity, One Additional Identity Zero is the Additive Identity.
One is the Multiplicative Identity.
Play_video
Basic Algebra Lesson 12 - Inverses, Additive and Reciprocal Discussed are necessary elements from arithmetic.
Students should master arithmetic before embarking on algebra.
Play_video
Basic Algebra Lesson 13 - Division and Subtraction Defined Differences and quotients are explained with our most basic operations.
We may define both subtraction and division as addition and multiplication, respectively.
Play_video
Basic Algebra Lesson 14 - Rearrange the Furniture The terms of a sum may be arranged in any order.
The terms of a product may be arranged in any order.
Play_video
Basic Algebra Lesson 15 - Cancel My Policy, Please We may subtract the same value from each side of an equality and maintain the equality.
We may divide the same value (a factor) from each side of an equality and maintain the equality.
Play_video
Basic Algebra Lesson 16 - Negative Multiplication When you have a single minus sign in a multiplication operation you're almost surely ending up on the negative side of the ledger. Play_video
Basic Algebra Lesson 307 Appropriate for both Basic Algebra and Advanced Algebra, we solve two inequalities in one variable joined with the conjunction OR. Play_video
Basic Algebra Lesson 308 This lesson is appropriate for both Basic Algebra and Advanced Algebra.
We solve two inequalities in one variable joined with the conjunction AND.
Play_video
Basic Algebra Problem 302 This lesson is appropriate for the "end of a basic algebra course" as well as "the beginning of an advanced algebra course." Play_video
Fast Lesson in Slope This is a fast lesson in slope. Play_video
Graphing Linear Inequalities 315 We make a quick sketch of two linear inequalities, then graph the region of intersection. Play_video
Like Terms 18 From A First Book in Algebra, Wallace C.
Boyden, 1895.
Watch your minus signs.
Play_video
Multiplying Polynomials When we multiply polynomials we sum individual products.
We multiply each term in one polynomial times each term in the other polynomial.
Play_video
Solve Linear Eqns with Fractions 05 These problems are also found in Solve Linear Eqns.
Problem Set 05.
Play_video
Solve Linear Equations 01 Practice with basic algebra at its finest.
These skills are important to build upon for more challenging problems that come later.
Play_video
Solve Linear Equations 02 Good, basic practice with simple equations in x. Play_video
The Ferry Problem This little quadratic problem lends itself to Basic Algebra, Advanced Algebra, and the Calculus.
In this video, we look at a simple spreadsheet to answer the question, "What fare should you charge to maximize your daily revenue for your ferry?"
Play_video

Inequalities

Title Description
Properties of Inequalities An overview of the Inequality Properties Handout and some notions about one-variable inequalities. Play_video

Inequalities

Title Description
Properties of Inequalities An overview of the Inequality Properties Handout and some notions about one-variable inequalities. Play_video
Compound Inequalities with the Conjunction "OR" We solve two inequalities in one variable joined with the conjunction OR. Play_video
Compound Inequalities with the Conjunction "AND" We solve two inequalities in one variable joined with the conjunction AND. Play_video
Inequality in One Variable with Absolute Value We solve a single variable inequality that includes an absolute value. Play_video
Square Roots and Absolute Values A review of square roots and absolute values.
Play_video

Linear Equations & Inequalities

Title Description
Finding Slope from a Graphed Line Lesson 2 A lesson in Slope.
We can read slope from a graph, or calculate it from given coordinates.
Play_video
Finding Slope from a Graphed Line Lesson 1 A lesson in Slope.
We can read slope from a graph, or calculate it from given coordinates.
Play_video
Finding Slope from a Pair of Points Problem Set 1 Simple calculations for Slope using a pair of Ordered Pairs. Play_video
A Fast Lesson in Slope A visual demonstration and lesson on slope.
We use Cartesian coordinates for this demonstration.
Play_video
Graphing Lines Given Y-Intercept and an Ordered Pair Given two points, where one point is the y-intercept, write the equation of the line as y = mx + b; and graph the line (segment) on the 10 x 10 grid. Play_video
Graphing Two Linear Inequalities What if we have two inequalities? In this lesson we address this scenario by graphing the intersection of two linear inequalities. Play_video
Square Roots and Absolute Values A review of square roots and absolute values.
Play_video

Linear Functions

Title Description
Finding Slope from a Graphed Line Lesson 2 A lesson in Slope.
We can read slope from a graph, or calculate it from given coordinates.
Play_video
Finding Slope from a Graphed Line Lesson 1 A lesson in Slope.
We can read slope from a graph, or calculate it from given coordinates.
Play_video
Finding Slope from a Pair of Points Problem Set 1 Simple calculations for Slope using a pair of Ordered Pairs. Play_video
A Fast Lesson in Slope A visual demonstration and lesson on slope.
We use Cartesian coordinates for this demonstration.
Play_video
Graphing Two Linear Inequalities What if we have two inequalities? In this lesson we address this scenario by graphing the intersection of two linear inequalities. Play_video

Monomial and Polynomials

Title Description
Negative Multiplication A Lesson on Handling Negative Multiplication with Algebraic Terms. Play_video
Multiplying Polynomials When we multiply polynomials we sum individual products.
We multiply each term in one polynomial times each term in the other polynomial, then add the products.
Play_video
An Interesting Relationship, with Algebra From our multiplication table, an interesting relationship between arithmetic and algebra.
We observe that x² - 1 = (x-1)(x+1), or, x² = (x-1)(x+1) + 1.
Play_video
Dividing Polynomials (Simplifying) We show how being able to factor terms allows to divide polynomials.
The result is akin to simplifying the rational expression.
Play_video
An Interesting Relationship It turns out that x² = (x-1)(x+1) + 1.
We look at this algebraic relationship with the standard multiplication table.
If you prefer, equivalently, x² - 1 = (x-1)(x+1).
Play_video
Dividing Polynomials with Long Division Lesson Quotients and remainders result from these division problems where both dividend and divisor are polynomials in one variable. Play_video

Monomials and Polynomials

Title Description
An Interesting Relationship It turns out that x² = (x-1)(x+1) + 1.
We look at this algebraic relationship with the standard multiplication table.
If you prefer, equivalently, x² - 1 = (x-1)(x+1).
Play_video
Multiplying Polynomials When we multiply polynomials we sum individual products.
We multiply each term in one polynomial times each term in the other polynomial, then add the products.
Play_video
Negative Multiplication A Lesson on Handling Negative Multiplication with Algebraic Terms. Play_video

Quadratic Function

Title Description
Graphing a Parabola Graph a Parabola As y = f(x), we have a simple quadratic that graphs to a parabola.
We employ y = a(x-h)² + k.
Play_video
Graphing a Sideways Parabola We look at a "sideways" function with the relation x = f(y) instead of our usual y = f(x). Play_video
Graphing Quadratic Functions We solve for the zeroes (roots) of a polynomial by factoring and by graphing, with assistance from the good folks at desmos.com. Play_video
Graphing a Simple Parabola We walk through a simple sketch of a graph of y = x² - 5.
The parabola is a conic section.
Play_video
Solving Roots of Quadratics by Completing the Square We solve for the zeroes (roots) of a polynomial with C.T.S.
(Completing the Square), by use of the Quadratic Formula, then by Factoring.
No words, just fast writing and nice music.
Play_video

Radical Expressions

Title Description
Simplifying Square Roots A few words about the simplifcation of radicals and square roots.
Sometimes simpler is not so simple.
Play_video
A Lesson in Simplifying Radicals Preaching the need to learn the Facts of Multiplication.
Learn the facts of the Times Table.
Please.
Play_video
Additional Examples with Simplifying Radicals Simplifying radicals (square roots) is really a test of your mastery of basic facts of multiplication.
Identifying the factors of the radicand will make it easy to work these problems.
Play_video
Detailed Examples with Simplifying Radicals Simplifying radicals (square roots) is really a test of your mastery of basic facts of multiplication.
Identifying the factors of the radicand will make it easy to work these problems.
Play_video
More Detailed Examples with Simplifying Radicals Simplifying radicals (square roots) is really a test of your mastery of basic facts of multiplication.
Identifying the factors of the radicand will make it easy to work these problems.
Play_video
Square Roots and Absolute Values A review of square roots and absolute values.
Play_video
A Lesson in Multiplying Radical Expressions Hard Problems: Now we are making our way from Algebra toward Advanced Algebra.
We multiply binomials with radical expressions.
Play_video
Dividing Radical Expressions (Level: Medium) Level: Medium.
Simplify fractions by cancelling factors top and bottom.
Make sure to rationalize the denominator.
Play_video
Dividing Radical Expressions (Level: Easy) Level: Easy.
We simplify fractions that contain radicals in the numerator and the denominator.
We cancel out factors simultaneously from top-and-bottom.
Play_video
Dividing Radical Expressions (Level: Hard) Level: Medium.
Simplify fractions by cancelling factors top and bottom.
Make sure to rationalize the denominator.
Play_video
The Distance Formula and the Pythagorean Theorem We find the distance between two points in rectangular (or Cartesian) coordinates.
We also look at the familiar Pythagorean Theorem for the relationship between sides of a right triangle.
Play_video

Rational Expressions

Title Description
Dividing Polynomials (Simplifying) We show how being able to factor terms allows to divide polynomials.
The result is akin to simplifying the rational expression.
Play_video
How to Divide Rational Expressions Dividing Rational Expressions is made easier by changing the operator to multiplication.
Multiply the First Fraction by the Reciprocal of the Second Fraction.
Play_video

Systems of Equations

Title Description
Systems of Equations - Substitution Method Isolate one variable by itself. Then re-write the other equation with the Substitution. Play_video
Systems of Equations - Graphing Method When we graph two lines, the point of intersection of those lines is the simultaneous solution to both linear equations. Play_video
Systems of Equations - Cramer's Rule Cramer's Rule is a handy way to solve systems of linear equations.
We use determinants of square matrices for the top-and-bottom of a fraction.
Play_video
Systems of Equations - Elimination Method We may eliminate a variable by adding two linear equations with opposite coefficients on the same variable.
So you "look ahead a bit" to figure out how to get those opposite coefficients.
Play_video
Solving System of Equations Example 2 We solve for the simultaneous solution to two linear equations.
We find where the lines intersect.
Play_video
Solving System of Equations Example 1 We solve two linear equations and examine the graph of their intersection. Play_video

Systems of Equations

Title Description
Systems of Equations - Substitution Method Isolate one variable by itself. Then re-write the other equation with the Substitution. Play_video
Systems of Equations - Graphing Method When we graph two lines, the point of intersection of those lines is the simultaneous solution to both linear equations. Play_video
Systems of Equations - Cramer's Rule Cramer's Rule is a handy way to solve systems of linear equations.
We use determinants of square matrices for the top-and-bottom of a fraction.
Play_video
Systems of Equations - Elimination Method We may eliminate a variable by adding two linear equations with opposite coefficients on the same variable.
So you "look ahead a bit" to figure out how to get those opposite coefficients.
Play_video
Solving System of Equations Example 2 We solve for the simultaneous solution to two linear equations.
We find where the lines intersect.
Play_video
Solving System of Equations Example 1 We solve two linear equations and examine the graph of their intersection. Play_video

Trigonometry

Title Description
Reciprocal Trigonometric Ratios Quickly learn the pairs of reciprocal trig functions: sine and cosecant are reciprocal trig functions; cosine and secant are reciprocal trig functions; tangent and cotangent are reciprocal trig functions. Play_video
Cofunctions The names of the six basic trig functions make it easy to follow: sine and cosine functions are cofunctions; tangent and cotangent functions are cofunctions; secant and cosecant functions are cofunctions. Play_video
The Basic TRIG Functions While we have six basic trigonometric functions, in this lesson we concentrate on "the first three," namely, sine, cosine, and tangent. Play_video
Tangent is Just Like Slope We introduce x, y, and r around a circle centered at the origin.
the radius of the circle is r, and points around the circle are the familiar (x, y).
Play_video
Inverse TRIG Functions Inverse TRIG functions return an angle. Play_video
The Distance Formula and the Pythagorean Theorem We find the distance between two points in rectangular (or Cartesian) coordinates.
We also look at the familiar Pythagorean Theorem for the relationship between sides of a right triangle.
Play_video
The Classic Ladder-Against-the-Wall Every trig course includes at least one problem of a ladder of fixed length resting against a vertical wall. Play_video
Pythagorean Relations with Sines and Cosines We solve for the sine and cosine of an acute angle within a right triangle. Play_video
Pythagorean Relations with Irrational Lengths We solve right triangles with various lengths of the sides.
The Pythagorean relation holds, where the sum of the squares of the legs (the perpendicular sides) is equal to the square of the hypotenuse (the square of the longest side).
Play_video
The Classic Ladder Before and After Moving the Base Just as we always have a static ladder problem in every trig course, we always have a problem where the base of the ladder is moved in a second scenario.
How far does the top of the ladder rise when we move the ladder's base a fixed distance toward the wall?
Play_video
The Classic Ladder Before and After Moving the Base - Alternate Approach In this solution to the Ladder Before and After problem, we use a Pythagorean relation instead of a trig function to derive the answer. Play_video
Sines and Cosines of Acute Angles in Right Triangles We practice with irrational numbers as we find the sine and cosine of acute angles within right triangles. Play_video
Area of a Triangle There are many ways to calculate the area of a triangle.
Trigonometry helps when the altitude of the triangle is unknown.
We look at Heron's (Hero's) Formula, as well as a 3x3 determinant.
Play_video

Word Problems

Title Description
A Lesson in Consentrations Parts per Million and Parts per Billion are explained in a way to let it soak in, as it were.
It is a very fluid idea.
Play_video
Sample Arithmetic Problems | Math Glossary | Solving Algebra Problems | Trig Homework | Homework Help with Algebra | Learn Trigonometry | Math Glossary Geometry | Calculus Glossary