Fashion fans have been left baffled by the inclusion of a triangle shape on many sweatshirts and jumpers, but traditionally, ...

The triangle shape on sweatshirts and jumpers has become more of a fashion trend in recent years - but it turns out there's a practical reason for the design dating back a century ...

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 ...

The base and the perpendicular height are at right angles to each other. The measurements used must be in the same units. For example, to work in cm a 45 mm measurement would have to be converted to ...

My theory for this is that it enables the instrument to hang freely while maintaining a horizontal section for ease of striking. It would, I suppose, work with pentagons, heptagons and nonagons too ...