For a pyramid to look like a pyramid, each of the four triangular-shaped sides must slope up and towards each other at the same angle so that they meet at a point at the top. The builders ...

You can build a model of the Great Pyramid, but first you need to scale it down. To do this, you will need to make the pyramid 3,000 times smaller than it really is! To achieve that, every 30 ...

There are five platonic solids, the tetrahedron ... A pyramid with a square base is a square-based pyramid. Image caption, 3D shapes that are non-polyhedral include cylinders, cones, and spheres.

Explains the concepts of volume for various geometric solids, including prisms ... the relationships between these shapes. For example, the volume of a pyramid is one-third that of a prism ...