Will give Brainliest Answer!

What is the arc length when Θ = 4 pi over 7 and the radius is 5 cm?

20 pi over 7cm < - - - I think it's this one, but I'm not sure

4 pi over 7cm

2 pi over 7cm

24 pi over 7cm

Comment

The circumference of a circle is 2 pi * r

Any part of the circle's circumference can be labeled as

Arc length = (k / 2pi) * 2*pi * r

The 2pi s will cancel out and you are left with

Arc Length = k * r

In this case, k is in radians.

Givens

k = 4 pi / 7

r = 5 cm

Solve

Arc Length = 4*pi * 5 / 7 = 20 * pi / 7

Ans you are correct.