Complementary,Supplementary, Vertical Angles

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What is the complement angle to 45°?

Back

45°.

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

What is the supplement angle to 120°?

Back

60°.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect.

Front

Are vertical angles congruent?

Back

Yes, vertical angles are always congruent (equal measures).

Front

If ∠A and ∠B are supplementary and ∠A = 70°, what is ∠B?

Back

∠B = 110°.

Front

If the measure of ∠1 is 30°, what is the measure of its complement?

Back

∠2 = 60°.

Front

If two angles are vertical, what can we say about their measures?

Back

They are equal.

Front

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

Back

90 - x.