please answer this question

Asked by  | 4th Dec, 2008, 08:56: PM

Expert Answer:

Let O be the incentre.We have:

area of triangle,A=AOB+AOB+AOB =1/2(r)(AB)+1/2(r)(BC)+1/2(r)(CA)

Hence r=A/s,where 2s=AB+BC+CA.

Answered by  | 6th Dec, 2008, 11:18: PM

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