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In a right angled DeltaABC,angleACB=90^(...

In a right angled `DeltaABC,angleACB=90^(@).` A circle is inscribed in the triangle with radius r, a, b, c are the lengths of the sides BC, AC and AB respectively. Prove that `2r=a+b-c.`

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`thereforea+b-c=2r`
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