Additive Angles and Angle measurement

Front

What is an instrument for measuring angles?

Back

Protractor

Front

Find the missing angle if the sum of angles is 130 degrees and one angle is 80 degrees.

Back

50 degrees

Front

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

Back

Supplementary angles

Front

How many degrees are in a straight angle?

Back

180 degrees

Front

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

Back

Complementary angles

Front

What is the term for an angle that measures exactly 90 degrees?

Back

Right angle

Front

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

Back

Vertical angles

Front

What is the total number of degrees in a circle?

Back

360 degrees

Front

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

Back

60 degrees

Front

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

Back

Acute angle