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Four Disks (Posted on 2005-02-02) Difficulty: 2 of 5
Four disks are arranged in a plane such that each is externally tangent to two others. Prove that the four points of tangency lie on a circle.

See The Solution Submitted by David Shin    
Rating: 3.0000 (4 votes)

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  Subject Author Date
Some ThoughtsAdded ObservationBractals2005-02-04 23:03:42
re(2): Initial ThoughtsJer2005-02-02 20:12:21
re: Initial ThoughtsHugo2005-02-02 18:49:04
solutionJer2005-02-02 17:32:27
Some ThoughtsInitial Thoughtsnikki2005-02-02 14:26:50
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