L = 2W
a).
P (peremeter) = 2(L + W)
P = 2(2W + W)
P = 2(3W)
P = 6W
b).
A (area) = LW
A = 2W(W)
A = 2W^2
c). L = 20 inches, W = 12 inches
P = 2(L + W)
P = 2(20 + 12)
P = 2(32) = 64 inches
d). L = 20 inches, W = 12 inches
A = LW
A = 20*12 = 240 sq inches