need help about triangle question..

[ryan_kidz]

in triangle SBC, SB= 12, BC= 15, and SC= 18. Let O be the point for which BO bisects angles SBC and CO bisects angle SCB. If M and L are on sides SB and SC respectively so that ML is parallel to side BC and contains point O, what is the perimeter of triangle SML?

I really appreciate for any helps!

thnx

 

[Denis]

I'm lazy on Sundays...please supply a diagram...

 

[stapel]

I think you're supposed to use the fact that triangle SMN is similar to triangle SBC, that O is the incenter, and that there is some sort of proportionality relationship between incenters and sides.

But I've been out of geometry too long to have specifics. Sorry.

Eliz.