A square-based pyramid is a pentahedron with a base shaped like a square. This means that the square base has four sides that are all equal. The pyramid has five faces, consisting of its base and four triangles as sides.
The five-sided polyhedron or pentahedron also has five vertices and eight edges. The formula for finding its volume is (1/3) x (area of base) x (height). If "a" represents the side length of the square base, then the area of the base is a^2. The formula for volume is (1/3) x (a^2) x (height).
The pyramids found in Egypt are square pyramids. There are also other types of pyramids, such as triangular and pentagonal pyramids.