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# What is a radian?

In the better-known degrees, a full circle is divided into 360 degrees. Radian is another angular measurement, where a full circle is dividied into (2 x pi) units called radia…ns. In other words, the arc along a circle of radius 1. The radian is the "natural" unit of angular measurements; several calculations are simpler when angles are in radians, especially in advanced math topics. ( Full Answer )