Complementary, Supplementary, and 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

If m∠1 = 30°, what is m∠2 if m∠1 and m∠2 are complementary?

Back

60°

Front

If m∠3 = 150°, what is m∠4 if m∠3 and m∠4 are supplementary?

Back

30°

Front

Find the value of x if m∠A + m∠B = 90° and m∠A = 35°.

Back

55°

Front

If m∠5 = 45°, what is m∠6 if m∠5 and m∠6 are vertical angles?

Back

45°

Front

What is the relationship between two angles that are both 90°?

Back

They are complementary angles.

Front

If m∠7 = 120°, what is m∠8 if m∠7 and m∠8 are supplementary?

Back

60°

Front

If two angles are complementary and one angle measures 25°, what is the measure of the other angle?

Back

65°.