Isometric transformation – Central symmetry dans Euclide Geometry Principles par Harvey Littleman Central symmetry of triangle ABC AB=A’B’, BC=B’C’, AC=A’C’ ∠ABC= ∠A’B’C’, ∠BAC=∠B’A’C’, ∠ACB= ∠A’C’B’ AB//A’B’, BC//B’C’, AC//A’C’ See also « Isometric transformation«
