The radius of a circle is 5 centimeters. What is the angle measure of an arc bounding a sector
with area 57 square centimeters?
Give the exact answer in simplest form.

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol