Topic 1 Geometry_Foundations of Geometry_Envision

Front

Point

Back

A point has no location and no size.

Front

Line

Back

An infinite number of points on a straight line/path that goes in two opposite directions.

Front

Plane

Back

An infinite number of points. Flat surface.

Front

Segment

Back

Part of a line consisting of two points called endpoints at the end of the line.

Front

Endpoint

Back

Point at the end of a line.

Front

Ray

Back

Part of a line with one endpoint and an arrow on the other end.

Front

Opposite Rays

Back

Two rays sharing the same endpoint and going in opposite directions.

Front

Angle

Back

Formed by two rays sharing the same vertex.

Front

Vertex

Back

The endpoint shared by two rays when forming an angle.

Front

Ruler

Back

A tool to measure distance.