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Vecten's Collinearity: What is it about?
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The following curious fact has been communicated to me by Professor Ricardo Barroso Campos from the University of Sevilla, Spain.
| In any triangle, the two Vecten points and the center of the 9-points circle are collinear. |
A trigonometric proof in trilinear coordinates could be found at Prof. Campos' site. He credits Montes Valderrama (2004) with the discovery of the fact.
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