In figure the radii of two concentric circles are 13cm and 8cm. AB is the diameter of the bigger circle. BD is the tangent to the smaller circle touching it at D. Find the length of AD.
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Plz see the attachment hope the answer is clear
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khaleelurrehman:
Thanks a lot
Welcome!!
How 2OD=AE ??
By mid point theorem
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hope it will help you
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