Angles and Angle Relationships

Front

What is an acute angle?

Back

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

Front

What is an obtuse angle?

Back

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

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Front

What is the sum of angles in a triangle?

Back

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

Front

What is a complementary angle?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What is a supplementary angle?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

How do you identify an angle greater than 90 degrees?

Back

An angle greater than 90 degrees is classified as an obtuse angle.

Front

What is the measure of a right angle in degrees?

Back

A right angle measures 90 degrees.

Front

If angle A is 45 degrees, what is its complement?

Back

The complement of angle A is 45 degrees, since 90 - 45 = 45.