Find Arc Length and Radians

How many radians are there in half a circle?

• 2 pi

• 180^o

• 360^o

• pi

How many radians does a circle have?

•   360 degrees

• 2pi radians

• pi radians

• ^{2 radians}

Convert 150⁰ to radians

• 5π/6

• 3π/4

• 7π/6

• 2π/3

Given that m∠AOB = 13π/18 and the radius is 8 cm, what is the length of arc AB?

• 13π/8 cm

• 52π/9 cm

• π/9 cm

• 9π/52

What is the approximate length of the arc subtended by an angle of 5π/6 radians on a circle with radius of 5.00 meters?

• 50.27 meters

• 13.09 meters

• 15.71 meters

• 12.52 meters

What is the length of the arc shown in​ red?

• 18π cm

• 2π cm

• 4π cm

• 3π cm

Find the length of the arc shown in red.

• 8π ft

• 4π ft

• 2π ft

• 16π ft

A central angle measures 4 radians and has an arc length of 28 inches. What is the diameter of the circle?

• 14 inches

• 7 inches

• 49 inches

• 6 inches

The length of an arc is 12 cm and the radius of the circle is 6 cm. What is the radian measure of the central angle?

• 2 radian

• 6 radian

• 4 radian

• 1 radian

The diameter of a circle is 10 centimeters. A central angle of the circle intercepts an arc of 20 centimeters. What is the radian measure of the angle?

• 2

• 4

• 1

• 5