<span>The length of an arc, L = theta/360 * 2 * pie * r
Where theta = 81 and r = 10ft = 3.048m
So length = 81/360 * 2 * pie * 3.048
L = * 0.225 * 2 * pie * 3.048
L = 1.37 * pie
L = pie. Option A</span>
A because the origin is at 0,0 and point A is at 0,0
The 3rd one
You can factor 3 out of each term in the numerator. And then divide it by the 3 in the denominator.
The answer is 820 (520+300)
