Finding Radians

What is 90° in radians?

• 1/2

• π/2

• 2/3

• 2π/3

What is the measure of the angle shown, in radians?

• π/2

• 3π/4

• 2π/5

• 3π/5

What is the measure of the angle shown, in radians?

• 3π/4

• π/2

• π

• 2π/3

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

• B

• C

• D

Find the radian measure of the marked angle.

A full rotation of a circle can be measured in how many radians?

• 180

• 360

• π

• 2π

What is 30° in radians?

• 1/6

• π/6

• 1/7

• π/7

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