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+5 votes
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In a traingle ABC,AD is the bisector of angle BAC and I is its incentre.Prove that AI/ID=AB+AC/BC

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Solution to your question: 

by (7.5k points)
Please explain how triangle ICA and ICD are similar?
by (9.9k points)
We know that bisector of an angle bisect in two equal angles. So, in ICA and ICD angles are equal and one common side. So they are similar
by (10 points)
But that will only be SA

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