Geometry Terms and Definitions

Front

Collinear

Back

Points on the same line.

Front

Congruent Segments

Back

Segments that have the same length.

Front

Complementary

Back

Sum of 90 degrees.

Front

Supplementary

Back

Sum of 180 degrees.

Front

Angles

Back

Consists of two different rays that have the same endpoint. Measured in Degrees

Front

Congruent Angles

Back

Two angles are congruent if they have the same measure.

Front

Intersecting lines

Back

Lines that cross each other at one single point.

Front

Adjacent Angles

Back

Share a common vertex and side.

Front

Vertical Angles

Back

Each of the pairs of opposite angles made by two intersecting lines.

Front

Parallel Lines

Back

Lines that have the same slope.