Radians and the good news
The good news is you don’t have to remember
1 radian `=57.296^@`
Because it is so easy to work out what the degrees are.
So if:
`360^@=100%` of circle
`2pir=360^@`
`1r=x^@`
(Look at our section on percentages)
| `(2pir)/r` | `=` | `360/x` |
| `x` | `=` | `(360timesr)/(2pir)` |
| `x` | `=` | `(360times cancelr)/(2pi cancelr)` |
| `x` | `=` | `360/(2pi)` |
| `x` | `=` | `57.296^@` |
