Expert: Ahmed Salami - 10/19/2004

Question
how many radians equal 360 degrees?

I know that the answer is expressed in termsd of pi but I can't remember whether it is 1, 2, or 4 pi

Answer
Hi Ian,
Sorry for any delay.
Let me give you a way of always remembering this. 360 degrees which corresponds to one revolution has a value of 2# in radians(where # = pi). This is related to the fact that the circumference of a circle of radius r is always
2#.r
Once you remember the formula for the circumference of a full circle, you'll be sure 360 degrees is 2# radians.
Regards.