Help me with this please

Step-by-step explanation:

The diagonal gives you a 30°-60°-90° triangle. The lengths of the sides of a 30°-60°-90° triangle are in the ratio 1:√3:2.

The side opposite the 60° angle is 12 ft.

The side opposite the 30° angle is 12/√3 ft

The side opposite the 90° angle is 2×12/√3 = 24/√3 = 24√3/3 =  8√3 ft

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

the answer is a

step-by-step explanation: