Angles

Front

What is an angle whose measure is exactly 90 degrees?

Back

Right angle

Front

What type of angles are less than 90 degrees?

Back

Acute angles

Front

What type of angle is greater than 90 degrees but less than 180 degrees?

Back

Obtuse angle

Front

What is the measure of a straight angle?

Back

180 degrees

Front

What is the measure of an acute angle?

Back

Less than 90 degrees

Front

What is the measure of an obtuse angle?

Back

Greater than 90 degrees and less than 180 degrees

Front

What do you call two angles that add up to 90 degrees?

Back

Complementary angles

Front

What do you call two angles that add up to 180 degrees?

Back

Supplementary angles

Front

What is the term for angles that are opposite each other when two lines cross?

Back

Vertical angles

Front

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

Back

60 degrees