De Gua 1

De Gua's theorem is a generalization of the Pythagorean theorem to three dimensions and named for Jean Paul de Gua de Malves. If a tetrahedron has a right angle corner (a corner like a cube), then the square of the area of the face opposite the right angle corner is the sum of the squares of the areas of the other three faces.
Just see WP, nothing to add for now.

Free as a piaf

They say at Wikideepia : "Help translate the current French translation of the month

fr:Liberté to Freedom



Cast your VOTE to select next month's translation! | Participate in French translation"



and the comments go : "Shouldn't it be translated at Liberty rather than Freedom? In French, there is only one word (liberté) for those two English terms. However, it is my understanding that Liberty designs, in English, more the philosophical concept, while freedom is more a concrete understanding of liberty."