Complementary, Supplementary, and Triangles

Front

What are complementary angles?

Back

Two angles that add up to 90 degrees.

Front

What are supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

What is an acute angle?

Back

An angle that measures less than 90 degrees.

Front

What is an obtuse angle?

Back

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

Front

What is a right angle?

Back

An angle that measures exactly 90 degrees.

Front

What is a straight angle?

Back

An angle that measures exactly 180 degrees.

Front

If one angle measures 72 degrees, what is the measure of its supplementary angle?

Back

108 degrees.

Front

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

Back

45 degrees.

Front

Find the value of x if x + 72 = 180.

Back

x = 108.

Front

Find the value of x if x + 18 = 90.

Back

x = 72.