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Article

Kuřina, František
QED (LATINSKY) $\ne$ QED (ANGLICKY). (Czech) [$QED$ (in Latin) $\neq$ $QED$ (in English)]. Učitel matematiky, vol. 22 (2014), issue 4, pp. 206-217
MSC: 37e50, 97G40
Summary:
The goal of the article is to show the origin and development of proofs. Different approaches to a geometrical problem with triangle are demonstrated. The beginning of solution of the problem is not only in logic, but also in intuition and imagination.
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