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Proof without words: beyond the parallelogram law
Published:
2003-06-01
https://doi.org/10.5485/TMCS.2003.0003
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Copyright (c) 2003 C. Alsina and A. Monreal
This work is licensed under a Creative Commons Attribution 4.0 International License.
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Alsina, C., & Monreal, A. (2003). Proof without words: beyond the parallelogram law. Teaching Mathematics and Computer Science, 1(1), 153-156. https://doi.org/10.5485/TMCS.2003.0003
Abstract
We present a visual proof of the parallelogram law and using it we can describe a visual proof of a classical theorem on convex quadrilaterals relating sides and diagonals.