Geometry Terms

Front

Angle

Back

The space (usually measured in degrees) between two intersecting lines or surfaces at or close to the point where they meet.

Front

Circle

Back

A round plane figure whose boundary (the circumference) consists of points equidistant from a fixed point (the center).

Front

Perpendicular

Back

At an angle of 90 degrees to a given line, plane, or surface.

Front

Equation

Back

A statement that the values of two mathematical expressions are equal (indicated by the sign =).

Front

Diagram

Back

A simplified drawing showing the appearance, structure, or workings of something.

Front

Volume

Back

The amount of space that a substance or object occupies, or that is enclosed within a container.

Front

Radius

Back

A straight line from the center to the circumference of a circle or sphere.

Front

Vertex

Back

Each angular point of a polygon, polyhedron, or other figure.

Front

Graph

Back

A diagram representing a system of connections or interrelations among two or more things by a number of distinctive dots, lines, bars, etc.

Front

Diagonal

Back

A straight line joining two opposite corners of a square, rectangle, or other straight-sided shape.