Circles and Angle Bisectors again help plsss...

Hi, im still confused about inscribed circles , well heres the prob:

The sides of a triangle are on the lines $\displaystyle 6x-7y+11=0$,$\displaystyle 2x+9y+11=0$, and $\displaystyle 9x - 2y - 11 = 0$. Find the equation of the circle inscribed in the triangle...

And could you use what soroban did in this thread?

http://www.mathhelpforum.com/math-he...bisectors.html

This's different from what he did When using the equation of directed distance here the square root of the denominatora is different and i dont know how to equate it ...

take your time...

Any help be appreciated