There is a problem with the command 'centroid' (in Dutch 'zwaartepunt').
See file below!
Thanks for a solution!
which GGB are you using on which system.
What is the problem?
On my system (Win10, GGB5.0 && GGB6.0-Desktop) I can't see any problems.
I use GeoGebra 6.0.535.0 on a Mac computer.
I think that the coordinates of Z are not correct.
What do you think they should be?
Sorry, I was wrong.
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