Find the arc length of the semicircle. 6

Question

i dont get it and i just wanna know the equation

Answer 1

arc length formula is radius times angle when the angle is measured in radians

L= r(A) where A = the angle in radians.

if a circle or semi circle has radius =6, then the arc length = L = 6A

arc length = radius times Angle = L =6A Semi circle or circle