Radian and Degree

Throughout history, angles have ben measured in many different units. The most contemporary angles units are .....

One radian is the angle made at the center of a circle by an arc whose length is equal to the radius of the circle.

• True

• False

What is 7π/4 radians in degrees?

• 300

• 135

• 315

• 45

What is 150 degrees in radians?

• 5π/6

• 7π/6

• 5π/4

• π/6

Find the arc length indicated by the bolded arc. 

• 8.3 in

• 7.2 in

• 6.8 in

• 6.4 in

What is 3π/4 radians in degrees?

• 315

• 135

• 150

• 330

What is 45 degrees in radians?

• π/2

• π/6

• π/4

• 3π/4

What is 90 degrees in radians? 

• π/4

• π/2

• π/6

• 3π/2

What is 270 degrees in radians? 

• π/4

• 3π/2

• 3π/4

• π/2

Find arc length

• 114π/5 ft

• 2850 ft

• 95π/6 ft

• 150π/19 ft