Coterminal Reference Angles

Find a coterminal angle to -90°.

• -450°

• 90°

• 180°

• -180°

Find a coterminal angle to -27°.

• -387°

• 27°

• 323°

• -393°

What are the negative and positive coterminal angles of 240°?

• 540°, -120°

• 600°, -120°

• 425°, -240°

• 120°, -135°

What are the negative and positive coterminal angles of -225°?

• 375°, -600°

• 125°, -356°

• 135°, -585°

• 60°, -120°

Find an angle coterminal with an angle which measures 11π ∕ 3.

• 17 π / 3

• 4π ∕ 3

• π ∕ 3

• 8π ∕ 3

Find an angle coterminal with an angle measuring 17π / 4 radians.

• π ∕ 3

• 5π ∕ 4

• π ∕ 4

• 13π ∕ 4

What is the reference angle for 240°?

• 60°

• 30°

• 45°

• 210°

What is the reference angle for -30°?

• 150°

• 30°

• 80°

• 60°

What is the reference angle for 275°?

• 85°

• 95°

• -85°

• -95°

Which of the following angles are coterminal to the angle -\frac{5\pi}{3} ? Select all that apply.