Lines and Angles

Front

What are parallel lines?

Back

Lines that will never intersect.

Front

What is a line?

Back

A straight path that extends in both directions forever.

Front

What type of lines never meet?

Back

Parallel lines.

Front

What is the measurement of a straight angle?

Back

180 degrees.

Front

What is a 45 degree angle called?

Back

Acute angle.

Front

What is an obtuse angle?

Back

An angle that measures more than 90 degrees but less than 180 degrees.

Front

What is a right angle?

Back

An angle that measures exactly 90 degrees.

Front

What are intersecting lines?

Back

Lines that cross each other at one point.

Front

What is a line segment?

Back

A part of a line that has two endpoints.

Front

What is a ray?

Back

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