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A circle with centre P is inscribed in t...

A circle with centre P is inscribed in the `triangle` ABC. Side AB, side BC and side AC touch the circle at points L,M and N respectively. Radius of the circle is r. Prove that: `A( triangle ABC)=(1)/(2)(AB+BC+AC)xxr`.

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NAVNEET PUBLICATION - MAHARASHTRA BOARD-BOARD'S QUESTION PAPER -QUESTION
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