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     EduGorilla 
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    The radii of two concentric circles are 13 cm and 8 cm. AB is a diameter of bigger circle. BD is tangent to the smaller circle touching it at D. Find the length AD.

    Options :-

    1. 19 cm
    2. 361 cm
    3. 91 cm
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Reply To: The radii of two concentric circles are 13 cm and 8 cm. AB is a diameter of bigger circle. BD is tan….
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