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120 = 1/2 * (3x + 5x) * 10
2(120) = (1/2 * (3x + 5x) * 10) 2
240 = (3x + 5x) * 10
(240)/10 = (8x * 10)/10
24 = 8x
8x = 24
(8x)/8 = (24)/8
x = 3
Panjang sisi sejajar 1 = 3x
Panjang sisi sejajar 1 = 3(3)
Panjang sisi sejajar 1 = 9 cm
Panjang sisi sejajar 2 = 5x
Panjang sisi sejajar 2 = 5(3)
Panjang sisi sejajar 2 = 15 cm