Geometry Terms

Front

What is a point?

Back

A point is a "dot" that represents a location. A point is 0 dimensions and is labeled with a single capital letter and a dot next to it.

Front

What is a segment?

Back

Has two endpoints and contains all the collinear points in between.

Name with two capital letters and a bar above.

Front

Back

Front

What is a ray?

Back

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

Name with two capital letters, the first must be the endpoint and the second letter is a point the ray passes through.

Front

Back

Front

Back

No, they have different endpoints (one is A and one is B) and would be extending in opposite directions.

To be the same ray, endpoints MUST be the same and go in the same direction.

Front

What is a line?

Back

A line is a straight one-dimensional figure having no thickness and extending infinitely in both directions.

Name with two capital letters (points on the line) or one lowercase letter which is near an arrow.

Front

Back

Front

Back

Front

What is an angle?

Back

An angle is formed by two rays with the same endpoint (vertex). In ∠ABC, point B is the vertex and points A and C are on the angle's sides.

Could also name ∠B.