Geometry Basics

Front

Point

Back

Exact location in space

Front

Angle

Back

Two rays that have the same endpoint and the endpoint is called the vertex

Front

Line

Back

Collection of points going on and on infinitely in both directions with no endpoints

Front

Acute Angle

Back

Smaller than 90 degree opening

Front

Line Segment

Back

Part of a line with two endpoints

Front

Obtuse Angle

Back

Larger than 90 degree opening

Front

Ray

Back

Part of a line with one endpoint and continues on and on in one direction

Front

Right Angle

Back

90 degree opening

Front

Intersecting Lines

Back

Lines that cross and have one point in common

Front

Straight Angle

Back

180 degree opening