1.) To find the surface area, we want to find the area of each side, then add them all up together: Area of base=lwA=(5)(5)A=25 cm² Area of triangle=1/2bhA=(1/2)(5)(12.5)A=31.25 cm² Since the 4 triangles have the same area, we can multiply the area we found by 4 and then add the area of the square: SA=(4)(31.25) + 25SA=125+25SA=150 cm²
