List of publications on a keyword: «прямоугольники»

This article can be considered the final proof of Euclid’s 5th postulate. Nevertheless, its main purpose is to show that the difference between Lobachevskian and Euclidean geometry is much more significant than is commonly believed to date.

If we replace the V Postulate of Euclid with the Postulate of Lobachevsky, then we can get rectangles with more than 4 angles. The article describes the methodology for constructing such rectangles.