Pythagoras' theorem can also be used to solve 3D problems. You often need to use Pythagoras' theorem more than once in each problem as we create extra right-angled triangles in the 3D shapes. First ...

The Penrose Triangle is as elegant as it is impossible—much like M.C. Escher’s drawings, it presents a two-dimensional illusion that the eye interprets as three-dimensional. The task of effectively ...

Named for Plato, who theorized that the classical elements were made of these regular polyhedrons, three of the Platonic solids are composed of equilateral triangles: the tetrahedron, octahedron, and ...

Using data and imagery from a 3-D scanner, the 3-D printer produces replicas of crashed cars. The finished product allows investigators to examine the scaled-down car from all angles in the palm of ...