Angle Relationships

The angle relationship shown is -

• complementary angles
• supplementary angles
• vertical angles
• angle bisector

Find the value of x.

• 18°
• 28°
• 38°
• 118°

If m∠1 = 30°, then m∠3 = 

• 30°
• 60°
• 150°
• undetermined

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.

What are supplementary 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

• x = 118

• x = 108

• x = 28

• x = 58

• x = 56

• x = 66

• x = 156

• x = 166

These angles are...

• Complementary

• Supplementary

• Neither

Find the missing angle.

• 60
• 70
• 50
• 140

Find the missing angle.  Find x.

• 20^o
• 70^o
• 160^o
• 180^o