Answer-A circle touches all four sides of a quadrilateral ABCD. If AB = 18 cm, BC = 21 cm and AD = 15 cm, t...

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If we have a circle onside the quadrilateral, then sum of the opposite side of Quadrilateral is equal. So, AD  BC  AB  CD 15  21  18  CD 36  18  CD CD  18 cm

A circle touches all four sides of a quadrilateral ABCD. If AB = 18 cm, BC = 21 cm and AD = 15 cm, then length CD is:

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