Did you know the Great Pyramid of Khufu was once 481.4 feet tall? It was built about 4,500 years ago. Today, it stands as a ...

In 360 BCE, Plato envisioned the cosmos as an arrangement of five geometric shapes: flat-sided solids called polyhedra. These immediately became important objects of mathematical study. So it might be ...

Some 3D shapes, like cubes and pyramids, can be opened or unfolded along their edges to create a flat shape. The unfolded shape is called the net of the solid. Here are some 3D shapes and their nets.

The base of the Great Pyramid is made from solid bedrock, carved 28 feet deep into the ground ... He continued to explain that the workers operated in teams, some cut the stones, others shaped them ...