In the given figure, a circle touches all the four sides of a quadrilateral ABCD whose three sides are AB = 6 cm, BC =7 cm, CD = 4 cm, then AD equals _____.
A
10 cm
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B
13 cm
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C
11 cm
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D
3 cm
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Solution
The correct option is D 3 cm We know that from a point outside the circle, the two tangents to the circle are equal.