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 ...

Father and daughter archaeologists Miles and Nora Holden (Denis O’Hare and Ashley Hinshaw) discover and excavate a unique triangular-based pyramid in the Egyptian desert that predates the ...

Despite its impressive level of accuracy, Egypt's Great Pyramid of Giza was not perfectly built. New measurements show the ancient monument's base is lopsided.

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, ...