N I O I P I Q I R I S I T I U I V I W I X I Y I Z

**A**I B I C I D I E I F I G I H I I I J I K I L I MN I O I P I Q I R I S I T I U I V I W I X I Y I Z

## R

In angle measure, 2

The distance from the center to a point on a circle; the line segment from the center to a point on a circle.

A number chosen without definite aim, reason, or pattern.

In statistics, the difference between the largest and the smallest numbers in a data set.

A ratio that compares different kinds of units.

A pair of numbers that compares different types of units.

The quotient of two polynomials.

A number that can be expressed as the ratio of two integers.

Part of a line, containing one endpoint and extending to infinity in one direction.

The number which, when multiplied times a particular fraction, gives a result of 1.

A quadrilateral with four 90 degree angles.

A transformation resulting from a flip.

An angle whose measure is between 180

A polygon in which all the angles are equal and all of the sides are equal.

The portion of the dividend that is not evenly divisible by the divisor.

A decimal in which the digits endlessly repeat a pattern.

A parallelogram with four equal sides.

An angle whose measure is 90 decimal.

A triangle that contains a right angle.

The vertical change between two points used to determine the slope of a line.

A transformation in which a figure is rotated through a given angle, about a point.

The horizontal change between two points used to determine the slope of a line.

**radian**In angle measure, 2

*π*of a revolution.**radius**The distance from the center to a point on a circle; the line segment from the center to a point on a circle.

**random**A number chosen without definite aim, reason, or pattern.

**range**In statistics, the difference between the largest and the smallest numbers in a data set.

**rate**A ratio that compares different kinds of units.

**ratio**A pair of numbers that compares different types of units.

**rational expression**The quotient of two polynomials.

**rational number**A number that can be expressed as the ratio of two integers.

**ray**Part of a line, containing one endpoint and extending to infinity in one direction.

**reciprocal**The number which, when multiplied times a particular fraction, gives a result of 1.

**rectangle**A quadrilateral with four 90 degree angles.

**reflection**A transformation resulting from a flip.

**reflex angle**An angle whose measure is between 180

*o*and 360*o*.**regular polygon**A polygon in which all the angles are equal and all of the sides are equal.

**remainder**The portion of the dividend that is not evenly divisible by the divisor.

**repeating decimal**A decimal in which the digits endlessly repeat a pattern.

**rhombus**A parallelogram with four equal sides.

**right angle**An angle whose measure is 90 decimal.

**right triangle**A triangle that contains a right angle.

**rise**The vertical change between two points used to determine the slope of a line.

**rotation**A transformation in which a figure is rotated through a given angle, about a point.

**run**The horizontal change between two points used to determine the slope of a line.