WOLFRAM|DEMONSTRATIONS PROJECT

Three Planes in a Trihedron

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.