Lines and angles

Front

What is a point?

Back

An exact location.

Front

What is a line?

Back

A straight path that extends in both directions forever.

Front

What is a ray?

Back

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

Front

What is an angle?

Back

Formed by two rays with a common endpoint called the vertex.

Front

What is a vertex?

Back

The point where two lines or rays meet.

Front

What are complementary angles?

Back

Two angles that add up to 90 degrees.

Front

What are supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

What are adjacent angles?

Back

Two angles that share a common side and vertex.

Front

What are corresponding angles?

Back

Angles that are in the same position on different parallel lines.

Front

What is a line segment?

Back

A part of a line that has two endpoints.