Math Terms

A radian measures an angle by comparing arc length with radius.

Radian Measure names a ratio, identity, graph feature, or coordinate method used in angle-based reasoning. In plain language, it gives a precise name to one useful fea...

Radicand is an algebraic object, rule, property, or method used to represent relationships between quantities. In plain language, it gives a precise name to one useful...

Radius names a standard feature of figures, coordinates, transformations, solids, or measurement systems. In plain language, it gives a precise name to one useful feat...

Radius of Convergence names a limit, derivative, integral, series, or differential-equation idea used in mathematical analysis. In plain language, it gives a precise n...

Random Experiment is a data or probability concept used to describe observations, uncertainty, variation, or evidence. In plain language, it gives a precise name to on...

Random Sample is part of the mathematical language for collecting, organizing, modeling, and interpreting data. In plain language, it gives a precise name to one usefu...

Random Variable is part of the mathematical language for collecting, organizing, modeling, and interpreting data. In plain language, it gives a precise name to one use...

Rank of a Matrix is an algebraic object, rule, property, or method used to represent relationships between quantities. In plain language, it gives a precise name to on...

Rate describes a part-whole, comparison, rate, scale, or financial relationship. In plain language, it gives a precise name to one useful feature of fractions ratios p...

A rate of change compares how much one quantity changes relative to a change in another quantity.

Rate of Return is a proportional-reasoning idea for relating quantities that may use different units or scales. In plain language, it gives a precise name to one usefu...

A ratio compares the relative sizes of two quantities by division while preserving the order of the comparison.

Ratio Table is a proportional-reasoning idea for relating quantities that may use different units or scales. In plain language, it gives a precise name to one useful f...

Rational Approximation is a proportional-reasoning idea for relating quantities that may use different units or scales. In plain language, it gives a precise name to o...

Rational Function is an algebraic object, rule, property, or method used to represent relationships between quantities. In plain language, it gives a precise name to o...

Raw Data names a method, quantity, study design, or distribution used in statistical reasoning. In plain language, it gives a precise name to one useful feature of sta...

Ray names a standard feature of figures, coordinates, transformations, solids, or measurement systems. In plain language, it gives a precise name to one useful feature...

Real Number describes a number, operation, pattern, or property used to reason about quantity and whole-number structure. In plain language, it gives a precise name to...

Reciprocal names a standard feature of numbers or arithmetic that helps organize calculation and comparison. In plain language, it gives a precise name to one useful f...

Reciprocal Identity is part of the language used to calculate or model direction, rotation, oscillation, and cyclic change. In plain language, it gives a precise name ...

Reciprocal Method is a proportional-reasoning idea for relating quantities that may use different units or scales. In plain language, it gives a precise name to one us...

Rectangle is a geometry or measurement concept used to describe position, form, size, motion, or spatial structure. In plain language, it gives a precise name to one u...

Recursive Definition is a standard algebraic idea for describing patterns, constraints, transformations, or solution methods. In plain language, it gives a precise nam...