A circle touches all the four sides of quadrilateral ABCD whose sides AB=6cm BC=7cm and CD=4cm. Find AD.
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let p,q,r,s be the points where the circle touches the quadrilateral. from a point outside of the circle of the two tangents to the circle are equal.
AP=AS, BP= BQ, CR,= CQ, and DR=DS
adding AP+BP+CR+DR=AS+BQ+CQ+DS
AB+CD=AD+BC
6+4=AD+7
AD=3cm
AP=AS, BP= BQ, CR,= CQ, and DR=DS
adding AP+BP+CR+DR=AS+BQ+CQ+DS
AB+CD=AD+BC
6+4=AD+7
AD=3cm
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