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Five elements congruent to the initial triangle form together a tiling. Its three angles each equals a corresponding angle of the first right triangle, and its area is 5 times the area of the first triangle. The similarity has a coefficient of √5.
Cinq éléments isométriques au triangle initial forment ensemble un pavage, aux trois angles égaux chacun à un angle correspondant du premier triangle rectangle. Et son aire est 5 fois celle du triangle initial. La similitude a un rapport de √5.
In order to show similarities of ratios 2 and √5, now a dashed line divides the triangular tiling into similar parts, one of the two being 2 times as large as the other, and then some little things are improved