A gradian, also called a grad or a gon, is a unit of angular measure in which the angle of an entire circle is 400 gradians. A right angle is therefore 100 gradians.
While some sources prefer "grad" ()'
Gradian
See also
Degree, RadianExplore with Wolfram|Alpha
References
Cardarelli, F. Encyclopedia of Scientific Units, Weights and Measures: Their SI Equivalences and Origins, Vol. 1. London, Springer: pp. 16 and 359, 2003.Dresner, S. Units of Measurement. New York: Hastings House, p. 49, 1971.Harris, J. W. and Stocker, H. Handbook of Mathematics and Computational Science. New York: Springer-Verlag, p. 63, 1998.Jerrard, H. G. and McNeill, D. B. A Dictionary of Scientific Units.ondon: Chapman and Hall, p. 16, 1986.Referenced on Wolfram|Alpha
GradianCite this as:
Weisstein, Eric W. "Gradian." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Gradian.html