I have this statement:
Are two similar rhombuses, if they have the three corresponding pairs of angles equal?
My answer was yes. Following the fundamental theorem (AA), in case of the triangle only 2 equal angles are needed, therefore in a quadrilateral, 3 equal angles will be needed.
But my answer was wrong, and this was the message:
The condition given in A) does not allow to determine that the rhombus are similar because it is also necessary that their corresponding sides are proportional
But, then this contradicts the fundamental theorem, which says that only the angles are necessary, to determine the similarity.