Geometry Vocab

Front

Part of a line that consists of one endpoint and all the points of the line on one side of the endpoint

Back

Ray

Front

Lines that intersect and form four 90 degree angles

Back

Perpendicular Angles

Front

Angle that measures 90 degrees

Back

Right Angle

Front

Part of a line that contains two endpoints and all points between them

Back

Line Segment

Front

A straight line that extends infinitely in both directions

Back

Line

Front

Angles that add up to 180 degrees

Back

Supplementary Angles

Front

Angles that add up to 90 degrees

Back

Complementary Angles

Front

Angles that are opposite each other when two lines intersect

Back

Vertical Angles

Front

A point that divides a line segment into two equal parts

Back

Midpoint

Front

An angle that measures less than 90 degrees

Back

Acute Angle