Find the surface area of a pyramid where the base is a square with sides of . The height of the side faces of the pyramid is .
First you need to find the area of the base surface:
Then you can find the area of the sides. Each side surface is a triangle with a base equal to m and a height of m:
Since the base is a square, that is, a quadrilateral, you have four such triangles. The total surface area then becomes