WEB TEXT: Elemental, My Dear Watson

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Science  14 Apr 2006:
Vol. 312, Issue 5771, pp. 169b
DOI: 10.1126/science.312.5771.169b

Published in the 3rd century B.C.E., Euclid's Elements stood as the authority on geometry for more than 2000 years. In this Web edition of the classic text, math professor David Joyce of Clark University in Worcester, Massachusetts, furnishes explanatory notes and updates. The pages also feature Java applets so that readers can, say, fiddle with the dimensions of a triangle to convince themselves of Proposition 6 from Book I, which holds that if two angles in a triangle are equal, the sides opposite them are also equal.


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