Geometry Vocabulary

Front

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

Back

Obtuse Angle

Front

Two lines that intersect (touch) to form right angles

Back

Perpendicular Lines

Front

A line with arrows on both ends

Back

Line

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

Two lines that never intersect and are always the same distance apart

Back

Parallel Lines

Front

A flat surface that extends infinitely in all directions

Back

Plane

Front

A straight path that has a definite beginning and end

Back

Line Segment

Front

The point where two lines meet or intersect

Back

Vertex