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This activity was created by '{$1}' and you lack the permission to edit it. Do you want to create your own copy instead and add it to the book?
Dreiecksfläche
Hier wird die Fläche eines Dreiecks bestimmt!
Kannst du die Fläche durch Kopfrechnen überprüfen?
Was wäre, wenn ein Punkt keine ganzzahligen Koordinaten hätte?