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Theorems on the Tetrahedron

Published online by Cambridge University Press:  03 November 2016

R. T. Robinson
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Extract

If a tetrahedron with its opposite edges perpendicular is inscribed in a conicoid, its orthocentre (the intersection of the perpendiculars from the vertices to the opposite faces) will lie on the conicoid if the asymptotic cone of the conicoid has three perpendicular generators.

Type
Research Article
Information
The Mathematical Gazette , Volume 21 , Issue 244 , July 1937 , pp. 188 - 202
Copyright
Copyright © Mathematical Association 1937

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