Answer:
96
Step-by-step explanation:
Triangles (front and back)
There are two right triangles -- front and back.
One triangle = 1/2*h*b
h = 3
b = 4
One triangle = 1/2 * 3 * 4
One triangle = 6
two triangles = 2*6 =12
Rectangle using the Net
Area = L * W
L = 3 + 4 + 5 = 12
W = 7
Area = 12 * 7 = 84
Total Area
Area = 12 + 84
Area = 96
