The area of a trapezium is 180 cm² and its height is 9 cm. If one of the parallel sides is longer than the other by 6 cm, find the two parallel sides.
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let the one parallel side be x other =x+6
area=1/2 ×9×(x+x+6)
180=1/2×9×18x+54
area=1/2 ×9×(x+x+6)
180=1/2×9×18x+54
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