8) The area of a trapezium is 465 cm’and the height is 15 cm. Find the length of its parallel sides, if one side is 4cm greater than the other. (3marks)
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area=1/2(a+b)h
465=1/2(x+4+x)15
465=15/2(2x+4)
465×2/15=2x+4
62=2x+4
62-4=2x
58=2x
58/2=x
29=x
x+4=33
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