Geometry Basics

Front

What is a flat surface that has no thickness and extends forever?

Back

Plane

Front

What do we call points that lie on the same line?

Back

Collinear

Front

What is a ray?

Back

A ray is a part of a line that has one endpoint and extends infinitely in one direction.

Front

What is the term for the point where two lines meet?

Back

Vertex

Front

What are two rays that have a common endpoint and form a line called?

Back

Opposite Rays

Front

What is a line segment?

Back

A line segment is a part of a line that has two endpoints.

Front

What is an angle?

Back

An angle is formed by two rays that share a common endpoint.

Front

What is a linear pair?

Back

A linear pair consists of two adjacent angles that form a straight line.

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.