A circle touches all the four sides of a quadrilateral abcd prove that

1.	A circle touches all the four sides of a quadrilateral abcd prove that AB+CD=BC+DA
Answer» Proof:we know that length of tangent drawn from ext. point are equal ..ye is se proof hoga..isse m detail me likh kr kaisr btau AQ+AS+PB+ps+cp+cs+qd+pd they have prove that AB+CD=BC+DA

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