Answer:
A. 144 cm2
Step-by-step explanation:
Area = length * width = x
Perimeter = 2(length) + 2(width) = 80
2(width) is equal to 72 (double the given width). The remaining 8 is equal to 2(length).
Divide 8 by 2 to get 4, the length of the unknown side.
Back to the area formula, width (36) times length (4) = 144
144 cm^2
