An angle of 180 degrees expressed in radians is
- A. pi over 2
- B. pi
- C. 2 pi
- D. 3 pi over 2
Explanation
A complete revolution of 360 degrees is 2 pi radians, so half a revolution is pi radians, roughly 3.14. A quarter turn of 90 degrees is pi over 2. Converting between the two is simply multiplying by pi over 180 in one direction and by 180 over pi in the other.