Random

Random Experiment

Random Number

Random Sample

Random Variable

Range

Range of a Distribution

Range of a Function

Range of a Relation

Rank of a Term

Raphael Bombelli (1526-1572)

Rate

Rate of Change of a Function

Rate of Return

Ratio

Ratio (in Geometric Sequence)

Ratio of Proportionality

Ratio of Similarity

Rational Equation

Rational Expression

Rational Function

Rational Number

Rationalization of a Denominator

Ray

Re-Entrant Angle

Re-Entrant Angular Sector

Real Frequency Table

Real Number

Real Part of a Complex Number

Reciprocal

Reciprocal of a Function

Reciprocal Operation

Reciprocal Relationship

Rectangle

Rectangular Matrix

Reducible Fraction

Reduction

Reference Point

Reflection

Reflection in a Cartesian Plane

Reflex Angle

Reflexive Relation

Reflexivity

Region In the Plane

Regular Convex Polyhedron

Regular Graph

Regular Polygon

Regular Polyhedron

Regular Prism

Regular Pyramid

Regular Solid

Regular Star Polygon

Regular Star Polyhedron

Regular Tessellation

Relation

Relationship of Congruence

Relationship of Cyclical Variation

Relationship of Direct Variation

Relationship of Equality

Relationship of Exponential Variation

Relationship of Inequality

Relationship of Inverse Variation

Relationship of Parallelism

Relationship of Partial Variation

Relationship of Perpendicularity

Relationship of Proportionality

Relationship of Second-Degree Variation

Relationship of Similarity

Relationship of Symmetry

Relationship of Zero Variation

Relative Error

Relatively Prime Numbers

Relay Node

Remainder

Remote Interior Angle

René Descartes (1596-1650)

Reproduction

Residue

Residue Class Modulo N

Result of an Operation

Rhomb

Rhombohedron

Rhombus

Rhombus-Based Pyramid

Richard Dedekind (1831-1916)

Right Angle

Right Circular Cone

Right Circular Cylinder

Right Cone

Right Cylinder

Right Prism

Right Pyramid

Right Rectangular Prism

Right Trapezoid

Right Triangle

Right Triangular Prism

Ring

Robert Recorde (1512-1558)

Rod Graph

Roman Numeral