Basics of Geometry Vocab

Front

Angle measuring 0-90°

Back

Acute

Front

Angle measuring 90°

Back

Right

Front

A straight path that extends infinitely in both directions.

Back

Line

Front

A straight path that extends infinitely in one direction.

Back

Ray

Front

Angle measuring 90-180°

Back

Obtuse

Front

Angle measuring 180°

Back

Straight

Front

A straight path with two endpoints

Back

Line Segment

Front

Figures with the same measurement

Back

Congruent

Front

Angles in the same plane with a common vertex & side, no overlap.

Back

Adjacent

Front

Angles that sum to 180°.

Back

Supplementary