Degrees, Radians, Co-Terminal and Reference Angles

Find an angle coterminal with 46°

• -314°

• 226°

• -46°

• 446°

What is 240 degrees in radians? 

• π/3

• 4π/3

• 5π/3

• 2π/3

Which angle is coterminal with 80º?

• 260º

• 440º

• –100º

• –400º

Angle θ is in standard position. What quadrant is the terminal side of θ in if θ measures 472º?

• I

• II

• III

• IV

What is the reference angle for 240 degrees?

• 60 degrees

• 30 degrees

• 45 degrees

• 210 degrees

What is the reference angle for 30 degrees?

• 70 degrees

• 30 degrees

• 150 degrees

• 330 degrees

What is the reference angle for -30 degrees?

• 150 degrees

• 30 degrees

• 80 degrees

• 60 degrees

How many RADIANS are in a circle?

• 180^o

• 360^o

• π rad

• 2π rad

The length of an arc is 18cm and the radius of the circle is 6cm. What is the radian measure of the central angle?

• 3 radian

• 2 radian

• 4 radian

• 2π radian

A central angle measure 4.5 radians and has an arc of 35 inches. What is the radius of the circle?

• 7.78 inches

• 8.21 inches

• 157.5 inches

• 7 inches