Answer:
552cm squared
Step-by-step explanation:
The first step is to find one of the surface areas of the triangles.
(12*17*0.5)
102
Now that we have one of them, we need to find what the four of them together is equal to.
(102*4) or 102 + 102 + 102 + 102
408
The next time is to find what the square is equal to.
(12*12)
144
The last step is to add the four triangles and the squares surface areas together.
408+144
552
The surface area of the shape is going to be 552cm^2
