ARITHMETIC GLOSSARY

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Title Description
Radical A root symbol or the root itself is sometimes termed a Radical.
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Radicand A number taken to a root is a Radicand; the number under a root sign.
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Radius One-half the diameter of a circle is the Radius.
It is the distance from the center of a circle to any point on the circle.
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Range We may speak of a Range of values as simply the difference between high and low values of a data set.
More specifically, the values generated by the input of domain values into a function map into the Range of values of the function.
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Ratio Sometimes Ratio is meant to state a constant proportion.
More generally, the Ratio of two real values is the quotient of one number divided by the other.
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Rational A Rational number can be expressed as the ratio of two integers.
When expressed as a decimal, a Rational number will either repeat or terminate (with repeating zeros).
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Rational Expression Mathematical statements written as fractions with a numerator and a denominator are often termed Rational Expressions.
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Ray A set of collinear points, a Ray has an endpoint and proceeds infinitely far in a single direction.
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Real Number Depicted on the Real Number line, such a value is either less than, equal to, or greater than every other real value.
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Reciprocal Every nonzero real value has a Reciprocal.
A number and its Reciprocal multiply to one.
We may find a Reciprocal of a number by dividing it into 1.
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Rectangle A quadrilateral with many special properties, including all those of a parallelogram, and then some.
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Relatively Prime Two integers with no common factors other than one are said to be Relatively Prime.
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Remainder When a divisor does not divide evenly into the dividend, we have a Remainder.
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Revolutions per Minute Abbreviated "rpm," it conveys the number of complete circular rotations that occur every 60 seconds at some constant rate of revolution.
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Right Angle An angle of 90 degrees or pi/2 radians.
Perpendicular lines meet at Right Angles.
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Right Triangle A triangle with a right angle.
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Root (Number) The Root of a given Number is the value that raised to the power of the root returns the given number. Play_video
Rounding Not exactly truncating, rounding involves reduction in the precision of a value to approximate that value to some exact value with less precision.
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