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50% 8 = 4
150% x - drugi bok - 12 cm
2x + 2 x 150/100x = 40
2x + 3 x = 40
5x = 40 |: 5
x = 8
P = 12 x 8 = 96
x + x + 1 1/2x + 1 1/2x = 40
5x = 40
x = 8
1 1/2x = 12
8 x 12 = 96 cm2