Angle Relations

Define Obtuse

• Less than 90
• Exactly 90
• Greater than 90 and less than 180
• Exactly 180

Define Acute

• Less than 90
• Exactly 90
• Greater than 90 and less than 180
• Exactly 180

Define Right Angle

• Less than 90
• Exactly 90
• Greater than 90 and less than 180
• Exactly 180

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.

Right, acute, or obtuse?

• Acute
• Right
• Obtuse

Find the missing angle.  Find x.

• 20^o
• 70^o
• 160^o
• 180^o

If ∠A and ∠B are supplementary, and the measure of ∠A is 120°, what is the measure of ∠B?

• 180
• 50
• 60
• 80

If ∠K and ∠S are complementary, and the measure of ∠K is 58°, what is the measure of ∠S?

• 122
• 22
• 110
• 32

If ∠H and ∠J are complementary, and the measure of ∠H is 45°, what is the measure of ∠J?

• 135
• 45
• 60
• 55

If ∠A and ∠B are supplementary, and the measure of ∠A is 120°, what is the measure of ∠B?

• 180
• 50
• 60
• 80