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Title: Jak se také dá poznat pravoúhlý trojúhelník (Czech)
Title: Another way of recognizing right triangle (English)
Author: Calda, Emil
Language: Czech
Journal: Učitel matematiky
ISSN: 1210-9037
Volume: 21
Issue: 3
Year: 2013
Pages: 159-161
Summary lang: English
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Category: math
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Summary: The author presents a proof that when given triangle $ABC$, point $P \neq S$ is a foot of a perpendicular from $C$ on $AB$, and $S$ is the middle of $AB$, then if angle $ACS$ equals angle $PCB$, then angle $BCA$ is a right one. (English)
MSC: 97G40
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Date available: 2022-03-09T14:33:55Z
Last updated: 2022-03-09
Stable URL: http://hdl.handle.net/10338.dmlcz/149505
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