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2015-05-18T18:55:53+08:00

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The bases of a trapezoid is always parallel. So the "parallel sides" are the bases..
Area= \frac{(b_1+b_2)h}{2} = \frac{(8+12)7}{2} = \frac{20*7}{2} =70

Therefore the area is 70 cm^2
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