Lines, Angles and More

Front

What is a line?

Back

A straight path that goes on forever in both directions.

Front

What are parallel lines?

Back

Two lines that run side by side and never meet.

Front

What is a ray?

Back

A straight path with one endpoint and goes on forever in one direction.

Front

What is a line segment?

Back

A straight path with two endpoints.

Front

What is a point?

Back

A point shows an exact location.

Front

What is a right angle?

Back

An angle that is the same size as a square corner.

Front

What is an acute angle?

Back

An angle that is smaller than a right angle.

Front

What is an obtuse angle?

Back

An angle that is larger than a right angle.

Front

What do we call two lines that intersect at a right angle?

Back

Perpendicular lines.

Front

What is the sum of angles in a triangle?

Back

180 degrees.