Drawing and Finding Angles

Front

What is an angle?

Back

An angle is formed by two rays that share a common endpoint, called the vertex.

Front

What is the measurement of a right angle?

Back

A right angle measures 90 degrees.

Front

What is the sum of angles in a triangle?

Back

The sum of angles in a triangle is always 180 degrees.

Front

What do we call an angle that measures less than 90 degrees?

Back

An angle that measures less than 90 degrees is called an acute angle.

Front

What do we call an angle that measures exactly 90 degrees?

Back

An angle that measures exactly 90 degrees is called a right angle.

Front

What do we call an angle that measures more than 90 degrees but less than 180 degrees?

Back

An angle that measures more than 90 degrees but less than 180 degrees is called an obtuse angle.

Front

What is the measure of a straight angle?

Back

A straight angle measures 180 degrees.

Front

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

Back

The complement of angle A is 60 degrees (90 - 30 = 60).

Front

If angle B measures 45 degrees, what is the measure of its supplement?

Back

The supplement of angle B is 135 degrees (180 - 45 = 135).

Front

What is the relationship between angles that are complementary?

Back

Two angles are complementary if the sum of their measures is 90 degrees.