Answer:
156 cm²
Explanation:
The surface area of a square pyramid is a² + 2al if a = the length of the side of the base of the pyramid and l = the height of each triangle. a would be equal to 6 in this case, since it is the length of the side of the base, and l would be 10 because it is the height of each triangle.
So, here's our expression:
6² + 2(6)(10) =
36 + 12(10) =
36 + 120 =
156
The surface area of the square pyramid is 156 cm². If this process doesn't make sense to you or if you'd like some further clarification, please let me know! :)