4.5 Angle Relationships

Front

What is the sum of the interior angles of a triangle?

Back

180 degrees

Front

What is the measure of a right angle?

Back

90 degrees

Front

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

Back

Complementary angles

Front

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

Back

Supplementary angles

Front

If two angles are vertical angles, what is true about their measures?

Back

They are equal.

Front

What is the measure of angle a if it is complementary to 34 degrees?

Back

56 degrees

Front

What is the measure of angle y if it is supplementary to 165 degrees?

Back

15 degrees

Front

What is the relationship between the angles in a linear pair?

Back

They are supplementary.

Front

If one angle measures 45 degrees, what is the measure of its complement?

Back

45 degrees

Front

What is the measure of an angle that is 3 times its complement?

Back

45 degrees