Concept

Definition

A definition is a statement that is used to determine meaning of a new term. In mathematics, definitions describe a condition which unambiguously qualifies what a mathematical term is and are therefore generally used to characterize a concept. Definitions can be explained using undefined terms and other definitions.

Example Definitions
Right Angle Parallelogram Circle
An angle whose measure is 90^(∘) or π2 radians. A quadrilateral with two pairs of parallel sides. A shape that consists of all the points in a plane that are equidistant from a given point.

Definitions and axioms form the basis of mathematics. For example, they are used to construct theorems and corollaries.

Exercises
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