ADVANCED ALGEBRA GLOSSARY
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Title  Description  

Oblique  In one sense, at an angle or not perfectly horizontal or vertical. An Oblique triangle is any triangle that is not a right triangle. 

Octant  As we have four quadrants in the rectangular plane, we have eight Octants in rectangular space. In three dimensions the three axes divide space into eight sections, each termed an Octant. 

Odd Function  An Odd Function adheres to this property: f(x) = f(x). The standard sine function is an odd function. 

Odds  The likelihood or probability of an event or specific outcome is termed the Odds of the event occurring. Odds, or probabilities, are always represented with values between 0 and 1, or between zero and 100 percent (inclusively). 

Omega  The last, or 24th, letter of the Greek alphabet is Omega. Uppercase Omega is used for ohms, a unit of electrical resistance. Lowercase Omega is used for angular velocity, a speed of rotation. 

Omicron  The 15th letter of the Greek alphabet. We don't use it in math because it looks just like an "o" or a zero. 

Open Interval  A section of a line whose set does not include the endpoints is considered an Open Interval. 

Order, Matrix  The Order of a Matrix is its size, expressed as "rows by columns."  
Order, Polynomial  The Order of a Polynomial relates to the highest power of variables in a term, typically the Order of the leading term of the Polynomial. 

Ordered Pair  Two coordinates are required to label a point in a plane, typically (x, y). 

Ordered Triple  Three coordinates are required to label a point in space, typically (x, y, z). 

Ordinal Number  Ordinal Numbers are ordinary numbers, or the sequential references of order as first, second, third, and so on. 

Orthogonal  Most generally Orthogonal means perpendicular to a plane. 

Outcome  A specific event is often termed an Outcome. 

Outlier  When plotting data points, as in a scatterplot, if a single data point is far removed from the neighborhood of the other data points, such a farremoved data point is called an Outlier. 
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