Measuring Angles and Finding the Missing Angle Supplementary and Complementary

Two angles are suppplementary if the sum of their angles is 180^o

• True

• False

Two angles are complementary if the sum of their angles is 90^o

• True

• False

How many degrees is a straight angle?

• 90

• 360

• 180

• 145

This is what kind of angle?

• right

• acute

• obtuse

• straight

• vertical
• supplementary
• complementary
• none of the above

• vertically opposite

• supplementary
• complementary
• none of the above

Find the missing angle.

What is the measure of the missing angle?

• 39°

• 129°

• 119°

• 129°

Find the value of x.

• 18°

• 28°

• 38°

• 118°

Find the value of x. This is a challenge questions!

Hint: 4x means 4 times x.

• 17°

• 28°

• 68°

• 39.5°