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97.26 The cosine rule in three dimensions and de Gua's theorem

Published online by Cambridge University Press:  23 January 2015

Rasul A. Khan*
Affiliation:
Cleveland State University, OH 44115, USA e-mail:, [email protected]

Abstract

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Type
Notes 97.17 to 97.38
Copyright
Copyright © The Mathematical Association 2013

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References

1. Khyfits, Alexander, The theorem of cosines for pyramids, The College Mathematics Journal 35 No.5 (2004) pp. 385388.Google Scholar
2. Klaine, Daniel A., An intuitive proof Heron's formula, Amer. Math. Monthly, 111 (2004) pp. 709712.CrossRefGoogle Scholar
3. Quadrat, Jean-P., Lasserre, Jean B., and Hiria, Jean-B.: Pythagoras' Theorem for Areas, Amer. Math. Monthly, 108 (2001) pp. 549551.CrossRefGoogle Scholar