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 Two concentric circles of radius 4 and 5 are drawn around a center O. The line AB is tangent to the smaller circle at point C and meets the bigger circle at A and B. What is the length of the line AB ?.

 

 Jun 8, 2020
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AB = sqrt( 102 / 2 )        or        sin(45º) * 10      or      sqrt(50)       or    sqrt(2) * 5 smiley

 Jun 8, 2020

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