the radii of two concentric circles are 13 cm and 8 cm ab is diameter of bigger circle and BD is tangent to smaller circle touching it at a and intersecting large circle at P on producing find the length of AP
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denilbhatt2004:
but how ab =26??
actually ob will be 8+13=21...
thus AB=2x21=42...
bro i have a simpler way...
see what we can after proving ODB and APB similler by AA is that OB/AB=OD/AP=1/2 ..... THUS AP=8x2=16... hope this helps you...
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