Angles, Right Obtuse, Acute

I can measure an angle with a device known as _______

How many types of angles are there

• 4

• 5

• 10

• 9

Vertical angles are always

• acute

• total 180 degrees

• congruent (equal measures)

• adjacent angles

Which are pairs of vertical angles?

• ∠COB & ∠COA

• ∠AOD & ∠AOC

• ∠COB & ∠AOD

• ∠BOD & ∠AOD

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

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

An angle whose measure is exactly 90 degrees.

• acute

• vertical

• right

• straight

This is what kind of angle?

• obtuse

• right

• straight

• acute

What type of angle is shown?

• acute

• obtuse

• right

• straight

Find the measure of the missing angle.

• 90^o

• 10⁰

• 130^o

• 50^o