Geometry Intro Vocabulary

Front

Definition of linear pair

Back

Adjacent angles that are supplementary.

Front

Definition of segment

Back

Part of a line that has two endpoints.

Front

Definition of reflex angle

Back

Angle that has a measure greater than 180 degrees but less than 360.

Front

Definition of ray

Back

Line that extends indefinitely in one direction.

Front

Definition of angle bisector

Back

Line or ray that divides an angle into two equal parts.

Front

Definition of acute angle

Back

An angle that measures less than 90 degrees.

Front

Definition of obtuse angle

Back

An angle that measures greater than 90 degrees but less than 180 degrees.

Front

Definition of straight angle

Back

An angle that measures exactly 180 degrees.

Front

Definition of complementary angles

Back

Two angles that sum to 90 degrees.

Front

Definition of supplementary angles

Back

Two angles that sum to 180 degrees.