Note on a trigonometrical proof of the orthocentre property of a triangle

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The following argument is simple and instructive, but I do not remember seeing it before.

Type: Research Article
Information: Edinburgh Mathematical Notes , Volume 23 , June 1925 , pp. 11

DOI: https://doi.org/10.1017/S1757748900001845 [Opens in a new window]

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Note on a trigonometrical proof of the orthocentre property of a triangle

Volume 23
H. W. Turnbull
DOI: https://doi.org/10.1017/S1757748900001845

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Note on a trigonometrical proof of the orthocentre property of a triangle

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