Radian Angles

Convert to radian measure 20 degrees

Convert to radian measure 90 degrees

Convert to radian measure 30 degrees

Convert to radian measure 66 degrees

• A

• B

• C

• D

How many radians does a circle have?

•   360 degrees

• 2pi radians

• pi radians

• 2 radians

The diameter of a circle is 8 centimeters. A central angle of the circle intercepts an arc of 12 centimeters. What is the radian measure of the central angle?

• 1.5

• 3

• 4

The diameter of a circle is 8 centimeters. A central angle of the circle intercepts an arc of 12 centimeters. What is the radian measure of the angle?

Mathematical Equivalence

ON

What is 120 degrees in radians?
 

• 2π/3

• π/3

• 5π/3

• 4π/3