Basic Geometry Vocabulary

Front

What is a line?

Back

A line has one dimension, is represented by a line with two arrowheads, and extends without end.

Front

What is a line segment?

Back

A line segment consists of 2 endpoints and all the points in between.

Front

What is a ray?

Back

A ray has one endpoint and extends infinitely in one direction.

Front

What is a plane?

Back

A plane is a flat surface made up of points that has two dimensions and extends without end.

Front

How can you name a line?

Back

A line can be named using two points on the line or a lowercase letter.

Front

What is an angle?

Back

An angle is formed by two rays with a common endpoint called the vertex.

Front

What is a point?

Back

A point indicates a location in space and has no dimensions.

Front

What is the difference between a line and a line segment?

Back

A line extends infinitely in both directions, while a line segment has two endpoints.

Front

What does ∠ABC represent?

Back

∠ABC represents an angle formed by points A, B, and C.

Front

What is the notation for a line segment between points A and B?

Back

The notation is ̅A̅ ̅B̅.