A pyramid with a triangular base is a triangle-based pyramid. A tetrahedron is a triangular pyramid with all equilateral triangle faces. A pyramid with a square base is a square-based pyramid.

The Great Pyramid of Giza is the last remaining Wonder of the Ancient World and mystery still surrounds it to this day. The square-based pyramid, a shape which usually has four sides, is the most ...

Object Details maker Wheeler, Albert Harry Description This plastic model has a white equilateral triangle for the base and three clear plastic isoseles triangles for sides. Models 1979.0102.205, ...