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प्रश्न
In the adjoining figure, a circle touches all the four sides of a quadrilateral ABCD whose sides are AB=6cm, BC=9cm and CD=8 cm. Find the length of side AD.
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उत्तर
We know that when a quadrilateral circumscribes a circle then sum of opposites sides is equal to the sum of other opposite sides.
∴ AB + CD = AD+ BC
⇒ 6 + 8 = AD = 9
⇒ AD = 5 cm
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