Find the arc-length of the sector of a circle with the given radius r and central angle θ. Give the answer in the given unit of measure, rounded to the nearest hundredth. r=20ft;θ=7π6

Answer 1

One of many really useful things about radians as a unit of measure is that it makes arc length (and area of a sector) formula so easy: s = rΘ

s = (20 ft)(7π/6) = 70π/3 ft ~ 73.30 ft