This great microfiber tie features geometry equations in white, and black geometric shapes on a navy blue background. This tie is perfect for any math whiz or teacher! Did you know... Ancient Greeks practiced centuries of experimental geometry like Egypt and Babylonia had, and they absorbed the experimental geometry of both of those cultures. Then they created the first formal mathematics of any kind by organizing geometry with rules of logic. Euclid's important geometry book "The Elements" formed the basis for most of the geometry studied in schools ever since.