Quadrilateral of Omar Khayyam, constructed in an effort to prove Euclid's postulate concerning parallel lines superfluous.
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Photo credit: © Encyclopaedia Britannica / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: -euclidean, angle, congruency, congruent, constructed, diagram, effort, euclid, figure, geometrical, geometrics, geometry, horizontal, illustration, illustrations, khayyam, lines, mathematical, mathematics, omar, paper, parallel, parallelogram, parchment, persian, postulate, prove, quadrilateral, rectangle, science, square, superfluous., triangle, vertical
