WOLFRAM|DEMONSTRATIONS PROJECT

Three Planes in a Trihedron

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point A
1.0477
point A'
1.1
point B
1.047
1.083
1.2
move plane
2
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Start with a trihedron with apex
O
and edges
OA
,
OB
,
OC
. Extend the edges by a factor
u>1
to a trihedron

OA
,

OB
,

OC
. Then the planes
ABC'
,
ACB'
and
BCA'
are concurrent. The common point is shown in red.