Complementary and Supplementary Angles

Complementary and Supplementary Angles

2020

Complementary Angles

• two angles that add up to 90°

• Example: 45° + 45° = 90°

• Example: 82° + 8°= 90°

Multiple Choice

Find x:

• 46

• 90

• 36

• 126

Multiple Choice

Find x:

• 73

• 63

• 153

• 143

Supplementary Angles

• Two angles that add up to 180°

• Examples: 120° + 60°= 180°

• Example: 84° + 96°= 180°

Multiple Choice

Find x:

• 34

• 51

• 146

• 14

Multiple Choice

Find x:

• 3

• 93

• 103

• 87

Multiple Choice

Find x:

• 62

• 180

• 50

• 40

Finding Angle Measures

• You can draw angles and write their measures in them

• The total amount the door opens is 100°

• Use the equation 100°= 85° + x°

Multiple Choice

What is the measure of the missing angle?

• 76

• 66

• 156

• 154

Multiple Choice

What is the angle at b?

• 90 degrees

• 39 degrees

• 45 degrees

• 25 degrees

Multiple Choice

Find what the value of x.

• 118

• 108

• 28

• 58