Coterminal and Reference Angles Quiz

What is the reference angle for an angle of 640°?

• 40°

• 80°

• 100°

• 140°

State if the angles 185° and -545° are coterminal.

• Yes

• No

• Sometimes

• Cannot be determined

Find a coterminal angle between 0° and 360° for -330°.

• 30°

• 90°

• 60°

• 120°

Find a coterminal angle between 0° and 360° for -435°.

• 285°

• 225°

• 315°

• 75°

Find a coterminal angle between 0° and 360° for 640°.

• 280°

• 360°

• 180°

• 280°