Grad (angle)

The grad is a unit of plane angle, equivalent to of a full circle, dividing a right angle in 100. It is also known as gon, grade, or gradian (not to be confused with grade of a slope, gradient, or radian). One grad equals of a degree or of a radian. In continental Europe, the term centigrade was in use for one hundredth of a grade, and the term myriograde was in use for one ten-thousandth of a grade. This was one reason for the adoption of the term Celsius for the unit of temperature.
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