Chapter 16: Angles

Which equation shows how to find the angle measure of the part of the circle without the arrow?

• 360° - 90° =

• 360° - 270° =

• 180° - 90° =

• 360° - 180° =

An arrow shows how a ray moved through a circle. Which statement best describes the turn?

• 1/2 turn counterclockwise

• 1/4 turn clockwise

• 3/4 turn counterclockwise

• 1/2 turn clockwise

What is the measure of the unknown angle in the figure?

• 30°

• 120°

• 180°

• 150°

Which equation shows the sum of the measures of two straight angles?

• 45° + 45° = 90°

• 90° + 90° = 180°

• 180° + 180° = 360°

• 100° + 100° = 200°

If an angle measures 75°, through what fraction of a circle does the angle turn?

• 1/75

• 75/360

• 180/360

• 90/360

Look at the figure. In degrees, what is the angle measure?

• 40°

• 250°

• 36°

• 4°

Which is an obtuse angle?

• ∠JHG

• ∠KHI

• ∠GHI

• ∠JHK

Which equation can you use to find the m∠ OMP?

• 80° + 40° =

• 180° - (80° + 40°) =

• 180° - 40° =

• 180° - 80° =

Which equation shows how to find the angle measure of the part of the circle without the arrow?

What name is given to an angle that measures 90°?

• straight angle

• acute angle

• obtuse angle

• right angle