1. May 23, 2013

### Googl

Hi all,

I have found this formula being used but I am not sure what it means. It is used to find the radius of a circle in a sector. Hope you can help me understand it.

$$sin(π/6) = r/(6-r)$$

r is the radius of the circle itself and 6 is the radius of the sector or the circle of the sector. I may have to post an illustration if you can understand.

Thank you.

2. May 23, 2013

### Staff: Mentor

A sketch would be useful, indeed.
I expect that the sketch shows what the formula means.