Complementary and Supplementary Angles, Acute, Right, and Obtuse

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.

If m∠1 = 30°, then m∠3 = 

• 30°

• 60°

• 150°

• undetermined

Find the missing angle.  Find x.

• 20^o

• 70^o

• 160^o

• 180^o

What type of angle is shown?

• acute

• obtuse

• right

• straight

Which of the following is NOT an example of supplementary angles?

A point where 2 rays meet to form an angle.

• vertex

• angle

• arc

• corner

This is what kind of angle?

• acute

• obtuse

• right

• straight

This is what kind of angle?

• obtuse

• right

• straight

• acute

This is what kind of angle?

• right

• acute

• obtuse

• straight

Find the measure of the indicated angle. 

• 89

• 211

• 119

• 81