Complementary & Supplementary Angles

What are complementary angles?

• Angles that add up to 180°

• Angles that add up to 90°

• Angles that are equal to each other

• Angles that are opposite of each other when lines intersect.

Use the image to answer the question.

• Definition of complementary angles
• Definition of vertical angles
• Definition of supplementary angles
• Definition of right angle

These are complementary Angles. What is the measure of the missing angle?

• 65

• 75

• 55

• 50

These two angles are complementary. What is the measure of the missing angle?

• 72

• 68

• 90

• 78

Are these complementary angles?

• Yes, they have a sum of 180 degrees

• Yes, they have a sum of 90 degrees

• No, it is a right angle

What is the value of the missing angle?

• 142

• 72

• 52

The angles are complementary. How do you know? Find the missing angle.

• Because they have a sum of 90 degrees. 46

• They have a sum of 90 degrees. 52

• They have a sum of 180 degrees. 52

• Because they have a sum of 180 degrees, 46

Find the missing angle.

• 70

• 50

• 30

• 40

The angles are complementary because they have a sum of 90. Find the missing angle.

• 28

• 32

• 60

• 38

Find the missing angle.

• 36

• 38

• 26

• 24