Math, asked by debasisbasak, 6 months ago

two concentric circle radii 15 and 9 cm. what is length of chord of larger circle which is tangent of smaller circle

Answers

Answered by vdivyanshu2006

2

∴In△ODA

OA2=OD2+AD2

(15)2=(9)2+AD2

AD2=225−81

AD2=144

AD=12cm

∴AB=2×AD

AB=2×12=24cm

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