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 What's the area? (Posted on 2002-05-08)
Consider the picture to the right. We have two concentric circles, one inside another. We do not know the radius for either one of them.

We do, however know that the chord (shown in red) - a line whose ends are on the outer circle and which is tangent to the inner circle - has a length of 10 inches.

What is the area (shaded in light-blue) between the two circles?

 See The Solution Submitted by levik Rating: 3.7333 (15 votes)

 Subject Author Date Puzzle Thoughts K Sengupta 2024-02-20 08:33:28 Thank you, Nikki CeeAnne 2004-10-05 14:17:53 re: Why not post the best solution? nikki 2004-10-05 07:44:36 Why not post the best solution? CeeAnne 2004-10-04 21:24:40 Solution Antonio 2003-08-22 05:31:02 corrected solution Ravi Raja 2003-03-03 17:34:16 What's the Area ? Ravi Raja 2003-01-06 02:37:04 i don't know you...here is my solution Daniel 2002-10-15 21:14:43 Area TomM 2002-05-09 23:34:50 Better Answer... Tom 2002-05-09 16:43:23 My Answer Tom 2002-05-09 12:37:27 I have the solution Sergio Pasini 2002-05-09 06:59:37 solution narcoleptic 2002-05-08 14:34:24 solution tony danza 2002-05-08 14:17:34 More info on Solution Andrew Elliott 2002-05-08 12:28:47 Solution?? Fizzle 2002-05-08 12:00:27

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