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Proof of a Geometrical Theorem

Published online by Cambridge University Press:  20 January 2009

W. J. Macdonald
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The middle points of the diagonals of a complete quadrilateral are collinear.

Let ABCDEF be a complete quadrilateral (see fig. 70), and X, Y, Z, the middle points of its diagonals. To prove X, Y, Z, collinear.

Type
Research Article
Information
Proceedings of the Edinburgh Mathematical Society , Volume 5 , February 1886 , pp. 51
Copyright
Copyright © Edinburgh Mathematical Society 1886