What is the surface area of the regular pyramid given below?

To find the surface area of any shape, you have to find the area of each side on the shape and then add them all up together:
Base: 8*8 = 64
Height(the triangle part) : 8*9 = 72
72/2 = 36 (Because equation to find area of a triangle is b*h/2)
So there are 4 of those triangle sides so you would do: 36+36+36+36 = 144

Then you add both sides together (base and height) : 64 + 144 = 208

Each trianglar side has an area: (1/2)*8*9=36
the base is a square with an area of 8*8=64
so the total surface area is 36+36+36+36+64=208