Simple Geometry

Front

Two angles whose measures have the sum 90°

Back

Complementary angles

Front

Two dimensional and extends without end, even though the drawing appears to have edges

Back

Plane

Front

Part of a line that consists of two points, called endpoints.

Back

Line segment

Front

Has no dimension and is represented by a dot

Back

Point

Front

Points that lie in the same plane

Back

Coplanar points

Front

A straight path that extends infinitely in both directions

Back

Line

Front

A part of a line that starts at a point and extends infinitely in one direction

Back

Ray

Front

An angle that measures exactly 90°

Back

Right angle

Front

Two angles whose measures have the sum 180°

Back

Supplementary angles

Front

A figure formed by two rays with a common endpoint

Back

Angle