Pre Calc help please!!!!

Question

 A janitor found a slice of pie left in a refrigerator he was cleaning. He measured the crust edge as 4 inches long, and the angle of the slice was 27°. Find the following and round to two decimal places:

a)      Radius and diameter of the original pie

b)     Area of the pie slice

Answer 1

arc length = radius times radians

4 = r(27)pi/180

r= 720/27pi = about 8.49 inches radius

diameter = 2r = about 16.98 inches

area = (27/360)pi(720/27pi)^2 = 1440/27pi = about 16.98 in^2