## How do you find the length of an arc with the radius?

**The arc length of a circle can be calculated with the radius and central angle using the arc length formula,**

## What is the arc length when θ pi over 3 and the radius is 5 cm?

5.23 cm

## What is the arc length if θ 7 pi over 4 and the radius is 5?

8.97 cm

## How do you find the arc length with the radius in terms of pi?

To find the arc length, set up the formula **Arc length 2 x pi x radius x (arc’s central angle/360), where the arc’s central angle is measured in degrees.**