[0, 0] + r·([28, 16.5] - [0, 0]) = 1/2·([2.5, 30] + [30.2, 35.4]) + s·[0, 1; -1, 0]·([30.2, 35.4] - [2.5, 30]) --> r = 25179/34588 ∧ s = 25833/34588
E = [0, 0] + 25179/34588·([28, 16.5] - [0, 0]) = [176253/8647, 830907/69176] = [20.38313866, 12.01149242]