Radian
From Wikipedia, a free encyclopedia written in simple English for easy reading.
A radian is a unit of measuring angles. It is represented by the symbol "rad" or, less commonly, c (for circular measure). The radian was once an SI unit, but was abolished in 1995.
[edit] Conversion
1 Radian is equal to approximately 57.2°. There are 2π radians in a full circle. The formula for converting radians to degrees and vice versa is:
or:
we can also say:
.
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