The special task for SW developers:)
I have a very simple task to build the 3D frame of half of the sphere. Sides must be flat. The radius of the sphere is 3 meters.
I can`t do this in 3D sketch even for one piece of this frame because of very strange SW restrictions (FEM software solves millions of equations with ease).
This peace is enough to find out dimensions of two main cells: central (5 sides) and main (6 sides).
It is a very interesting task.
When your 3D sketch becomes fully constrained (black), check your design with the model shown below to be sure that SW doesn`t fool you.