The picture shown is a unfolded rectangular prism.
The formula to find the surface area of a rectangular prism is:
A = 2(WL+HL+HW)
(W = width, L = Length, H= Height)
So we would need to determine the Height, Length, and Width first, and then plug them into the formula and solve for the area.
In this case: The height is: 4 cm The length is: 10.5 cm The width is: 6.4 cm
Now that we have determined the height, length, and width, we simply plug them into the formula I showed earlier. In this case the answer would be 269.6.
