1) Find the surface area of the 4 triangles
To find it we can use the area of triangle formula to find one of the triangle and multiply it by 4.
6*6/2 = 36/2 = 18
Then multiply 4
18 * 4 = 72 in^2
2) Next find the surface area of the square.
B * H
6 * 6 = 36
3) Add the 4 triangle sides and the square together to find the surface area.
36 + 72 = 108 in^2
The answer is 108 in^2