the area of trapezium is 210cm^2 the ratio between the length of its parallel side is 3:4 if the height is 6cm find the length of the both the parallel side
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A=(1/2)(h)(B+b) is the formula for the area of a trapezoid
210=(1/2)(6)(3x+4x) (3 and 4 must be multiplied by some number, the same number, to get the lengths of the bases)
210=(3)(7x)
210=21x
x=210/21
x=10
the bases are 3*10=30 cm and 4*10=40 cm (the parallel sides are the bases)
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