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If d1,d2 (d2>d1) be the diameters of two...

If `d_1,d_2` (d_2>d_1) be the diameters of two concentric circles and c be the length of a chord of a circle which is tangent to the other circle prove that `d_2^2=c^2+d_1^2`

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The correct Answer is:
`d_(2)^(2)=C^(2)-d_(1)^(2)`
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