Basic Geometry Definitions

Front

What is the common endpoint of two rays that make up an angle?

Back

Vertex

Front

What is a part of a line that begins with a point and extends forever in one direction?

Back

Ray

Front

What do you call two rays that share a common endpoint?

Back

Angle

Front

What is a location in space that is represented by a dot and has no dimensions?

Back

Point

Front

What is the term for a flat surface that extends infinitely in all directions?

Back

Plane

Front

What is a straight path that extends infinitely in both directions?

Back

Line

Front

What is a part of a line that has two endpoints?

Back

Line Segment

Front

What is the term for the distance around a circle?

Back

Circumference

Front

What do you call the measure of the space inside a shape?

Back

Area

Front

What is the term for the distance from the center of a circle to any point on its circumference?

Back

Radius