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Pappus's hexagon theorem

From Wiktionary, the free dictionary

English

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Etymology

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Attributed to the Ancient Greek mathematician Pappus of Alexandria (c. 290–c. 350 AD).

Proper noun

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Pappus's hexagon theorem

  1. (geometry) A theorem valid for projective planes over any field, stating that, given one set of collinear points and another set of collinear points , the intersection points of line pairs and and and are collinear, lying on the "Pappus line". These three points are the points of intersection of the "opposite" sides of the hexagon .
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