Types of Angles and Lines

Front

What are intersecting lines?

Back

Lines that cross each other at any angle.

Front

What are parallel lines?

Back

Lines that never meet and are always the same distance apart.

Front

What are perpendicular lines?

Back

Lines that intersect at a right angle (90 degrees).

Front

What is an acute angle?

Back

An angle that is less than 90 degrees.

Front

What is a right angle?

Back

An angle that is exactly 90 degrees.

Front

What is an obtuse angle?

Back

An angle that is greater than 90 degrees but less than 180 degrees.

Front

What is a straight angle?

Back

An angle that is exactly 180 degrees.

Front

What is a ray?

Back

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

Front

What is a line segment?

Back

A part of a line that has two endpoints.

Front

How do you identify parallel lines in a figure?

Back

Look for lines that are equidistant and never intersect.