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On pedal tetrahedra

Published online by Cambridge University Press:  31 October 2008

R. T. Robinson
R. T. Robinson
Affiliation:
115 Shobnall Road, Burton-on-Trent.
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1. In a tetrahedron ABCD with its opposite edges perpendicular there are two tetrahedra which can be described as pedal tetrahedra. (1) the tetrahedron A0B0C0D0 where these points are the feet of the perpendiculars from ABCD on to the faces BCD.

Type
Research Article
Information
Edinburgh Mathematical Notes , Volume 31 , January 1939 , pp. iv - viii
Copyright
Copyright © Edinburgh Mathematical Society 1939

References

1 Math. Notes 30, 05 1937.Google Scholar