A polyhedron (plural polyhedra or polyhedrons) is often defined as a geometric object with flat faces and straight edges (the word polyhedron comes from the Classical Greek ÏÎ¿Î»ÏÎµÎ´ÏÎ¿Î½, from poly- , stem of ÏÎ¿Î»ÏÏ, many, + -edron, form of ÎµÎ´ÏÎ¿Î½, base, seat, or face). polyhedron is any three-dimensional figure with flat surfaces that are polygons. Specifically, any geometric shape existing in three-dimensions and having flat faces, each existing in two-dimensions, which intersect at straight, linear edges.
In 1839, Charles Goodyear invented rubber vulcanization, but the first rubber condom was not produced until 1855. Just a few short years later, the majority of rubber companies were producing condoms as well. These condoms were reusable, which meant they were much more affordable.
The Babylonians made and utilized a single-tube seed drill, but the exact year is not known. It was sometime around 1500 BC. The Chinese developed a multi-tube see â¦ d drill, but again the year is not known. It was sometime in the 2nd century BC. Camillo Torello made the first seed drill in Europe. He received a patent for it in 1566. The seed drill as we now know it was invented in 1701 by agricultural pioneer Jethro Tull (Yes, the band was named after him).