Question

Arc length

A circle has a radius of 10. An arc in this circle has a central angle of 72°.
What is the length of the arc?
Either enter an exact answer in terms of it or use 3.14 for and enter your answer as a decimal.

Answer 1

Answer:4π

Explanation:

Φ=72

Radius=r=10

Length of arc=Φ/360 x 2 x π x r

Length of arc=72/360 x 2 x π x 10

Length of arc=0.2 x 2 x π x 10

Length of arc=4π