Complementary,Supplementary, Vertical Angles

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 are vertical angles?

Back

Angles that are opposite each other when two lines intersect; they are always equal.

Front

What is the complement of a 45° angle?

Back

45° (because 45° + 45° = 90°).

Front

If one angle is 30°, what is its supplementary angle?

Back

150° (because 30° + 150° = 180°).

Front

How do you find the missing angle in a pair of supplementary angles?

Back

Subtract the known angle from 180°.

Front

How do you find the missing angle in a pair of complementary angles?

Back

Subtract the known angle from 90°.

Front

If ∠A and ∠B are vertical angles, what can be said about their measures?

Back

They are equal.

Front

What is the equation to find the complement of an angle x?

Back

90 - x.

Front

What is the equation to find the supplement of an angle x?

Back

180 - x.