## Euclide’s Mistakes

The fifth postulate In Euclid’s geometry, regarding a plane, he uses the concepts point and straight line. He postulates, that a point and a straight line together can define a unique straight line, parallel to the given line and passing through the given point. However, he never provided a proof for this postulate – the […]

Continue Reading...## Euclid Was Wrong

An earlier contribution from this author was calledÂ The Definition of Parallelism. The article stated that the definition of parallelism in Euclidean geometry is wrong. The motivation was that the lack of a point common to two lines was used in the definition. Instead it was stated that only existing concepts should be used in a […]

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