Try to disprove SSA~
Change the zoom slider to make the A'B'C' bigger or smaller. Angle A will be held congruent to angle A'. A'B' <->AB and B'C' <-> BC will be held proportional, using the zoom factor. If you create a triangle with A'B'C' it will glow green if it is similar to ABC, red otherwise.
Can you create a triangle A'B'C' that is NOT similar to ABC?