Types of angles

Front

What is an acute angle?

Back

An angle that is open less than a right angle and has a measure less than 90 degrees.

Front

What is an obtuse angle?

Back

An angle that is open more than a right angle but less than a straight angle. This angle measures between 90 and 180 degrees.

Front

What is a right angle?

Back

An angle that forms a square corner and has a measure of 90 degrees.

Front

What is a straight angle?

Back

An angle that measures exactly 180 degrees.

Front

How many degrees are in a full rotation?

Back

360 degrees.

Front

What type of angle is greater than 180 degrees but less than 360 degrees?

Back

Reflex angle.

Front

Identify the type of angle that measures exactly 90 degrees.

Back

Right angle.

Front

What is the sum of angles in a triangle?

Back

180 degrees.

Front

If one angle is 30 degrees, what is the measure of its complement?

Back

60 degrees.

Front

If one angle is 120 degrees, what is the measure of its supplement?

Back

60 degrees.