Geometry Vocabulary

Front

An angle that measures more than 90 degrees but less than 180 degrees

Back

Obtuse Angle

Front

Lines that cross or touch at one point

Back

Intersecting Line

Front

Part of a line with two endpoints

Back

Line Segment

Front

A part of a line that starts at an endpoint and extends forever in one direction

Back

Ray

Front

A location in space that is represented by a dot and is labeled with a letter

Back

Point

Front

An angle that measures exactly 90 degrees

Back

Right Angle

Front

Lines that never intersect and are always the same distance apart

Back

Parallel Lines

Front

A straight line that measures 180 degrees

Back

Straight Angle

Front

A figure formed by two rays with a common endpoint

Back

Angle

Front

A flat surface that extends infinitely in all directions

Back

Plane