Shirali, Shailesh A.
(2012)
The fine art of euclidean geometry Viviani’s theorem . . .
and a cousin.
At Right Angles, 1 (2).
pp. 23-26.
Abstract
‘‘ I think it is said that Gauss had ten different proofs for the law of quadratic
reciprocity. Any good theorem should have several proofs, the more the
better. For two reasons: usually, different proofs have different strengths and
weaknesses, and they generalise in different directions — they are not just
repetitions of each other. ’’ Sir Michael Atiyah, interview in European
Mathematical Society Newsletter, September 2004.
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