Angle Pair Relationships

Complementary Angles are...

• Two angles that are next to each other.

• Two angles that are across from each other and whose measures are equal.

Supplementary Angles are...

• Two angles that are next to each other.

• Two angles that are across from each other and whose measures are equal.

True or False. These angles are complementary.

• True

• False

Find M.

(a)  

True or False. ∠1 and ∠2 are vertical angles.

• True

• False

What is the equation that could be used to solve for the missing angle measure?

• x + 64 = 90

• x = 64

• x + 64 = 180

• 90 - x = 64

Tell whether the angles are complementary or supplementary. Then find the value of x.

• Complementary; x=25
• Complementary; x=5
• Supplementary; x=25
• Supplementary; x=5

Find the value of x.

• 15

• 16

• 18

• 19

Find the missing angle.

• 53

• 67

• 77

• 43

What is an example of a pair of complementary angles?

• 13° and 45°
• 10° and 170°
• 81° and 9°
• 90° and 3°