Understanding and measuring angles

Which quadrant is $\frac{2\pi}{3}$  radians in?

• I

• II

• III

• IV

Which is a coterminal angle to the angle shown?

• -38

• 360

• 398

• 142

If you drew a 405^o angle in standard position, where would the terminal side lie?

• Quadrant 1

• Quadrant 2

• Quadrant 3

• Quadrant 4

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

• 375°, -605°

• 125°, -355°

• 135°, -585°

• 60°, -120°

In which quadrant is the following angle located (terminal side)?

 $506\degree$ 

• I

• II

• III

• IV

Find the reference angle for 205 degrees.

What is the cos(585)?

• 1/2

• root(2)/2

• -root(2)/2

• -root(3)/2

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

• 17 π / 3
• 4π ∕ 3
• π ∕ 3
• 8π ∕ 3

What is the reference angle?

• 38

• 52

• 142

• 398