Gradian - Wikipedia, the free encyclopedia
The gradian is a unit of measurement of an angle, equivalent to 1 ⁄ 400 of a turn, [1] 9 ⁄ 10 of a degree or π ⁄ 200 of a radian. It is also known as gon (from Greek γωνία/gōnía for angle), grad, or grade. In continental Europe, the French term centigrade...