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Regular ninth-angle pyramid

Regular ninth-angle pyramid
At the base of the pyramid is the right ninth-corner (all sides are equal, the angles between the sides are 140 degrees).
 
The height of the pyramid is exactly in the center of the nine-cornered base.
Regular ninth-angle pyramid
net Regular ninth-angle pyramid
 

Geometric dimensions of the finished pyramid (mm):
Length = 107
Width = 110
Height = 85

 

 
 

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