# Math Help - [SOLVED] Simple Radian Question

1. ## [SOLVED] Simple Radian Question

this is probably a very stupid question but how is there 180/pi radians in a circle when one radian is found where the angles circumference arc is equal the radius??

what i mean is, if you look at this image where 1 radius is calculated, id does not look as though there would be 57 radians (180/pi) around this circle but more like 7 point something...

2. There are not $\frac{180}{\pi}$ radians in a circle.

$\frac{180}{\pi}$ is a conversion rate between radians and degrees.

There are $2\pi$ radians in a circle; try reading about them here: Radian - Wikipedia, the free encyclopedia

It might also help to see a problem using them: http://www.mathhelpforum.com/math-he...e-measure.html

Let us know if you need more of an explanation.

3. makes sense now, cheers