Degrees/Radians, Co-Terminal and Reference Angles

What is 0 degrees in radians? 

• 2π 

• 0

• π

•  π/2

What is the reference angle for 125°?

• 235°

• 125°

• 75°

• 55°

What is the reference angle for -30°?

• 150°

• 30°

• 80°

• 60°

Which of the following is a negative coterminal angle of 165 degrees?

• -165

• 525

• -525

• -555

What are co-terminal angles?

• angles that share the same terminal side

• angles that are supplementary

• angles that are complimentary

• angles that are opposite each other

What is 240 degrees in radians? 

• π/3

• 4π/3

• 5π/3

• 2π/3

Which of the following radian measures is represented by this diagram?

What is the best estimate of the measure of the angle shown?

• 330º

• –330º

• 150º

• –150º

Which angle is coterminal with 80º?

• 260º

• 440º

• –100º

• –400º