1. pyramid (Pyramid) is a triangle with a base of any of the spires, which is not a square, there are on the same plane, and every face is a triangle with a vertex at the spires share .
1 Pyramid (Pyramid) is a triangle whose base is any polygon with sharp peaks which are not on the same plane, and every page is a triangle with vertices together at the apex.
1. Pyramid (Pyramid) is a triangle shape with a base polygon to any spire, which is not on the ระนาบเดียวกัน and every page is a triangle with vertices together, pointed that .