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Double Secant (Posted on 2018-02-15) Difficulty: 3 of 5
Two concentric circles of radius R and r, with R>r are both intersected by the same secant line. The points of intersection, in order, are A,B,C,D.

Prove AC*CD is constant.

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  Subject Author Date
SolutionSolutionBractals2018-02-20 19:07:58
solutionxdog2018-02-15 12:34:16
Some Thoughtsnot a mathematical proof, but beyond a reasonable doubtCharlie2018-02-15 09:29:37
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