**How Many Sides Are In A Pyramid**. The base is a pentagon (5 sides). Each base edge and apex form a triangle, called a lateral face.

Nubian pyramids at meroe with pylon. In geometry, a pyramid is a polyhedron formed by connecting a polygonal base and a point, called the apex. 1, 4, 10, 20, 35, 56, 84, 120, 165, 220,.