A pyramid is named by the shape of its ‘base’. A pyramid with a triangular base is a triangle-based pyramid. A tetrahedron is a triangular pyramid with all equilateral triangle faces.

Egypt’s “bent” pyramid built for the Pharaoh Sneferu is a remarkable structure as well as being an archaeological wonder. This bent shape is said to be an example of the architectural ...

You can get pyramids with different shaped bases. Triangles, pentagons, hexagons, any shape. And a circle becomes a sphere with just one large, curved face, like a ball. Perfect for, uh ...

If there are more children than elderly people, the chart will have the shape of a true pyramid. Take 1950, for example. Here, the post-war baby boom generation is clearly visible. Nowadays, only the ...

If there are more children than elderly people, the chart will have the shape of a true pyramid. Take 1950, for example. Here, the post-war baby boom generation is clearly visible. Nowadays, only the ...

Why it's incredible: The mountain looks like a human-made pyramid. A mountain that's hidden in a sea of snow in Antarctica looks strikingly like an ancient Egyptian pyramid when viewed from above.