Find the area of A trapeziun whose parallel sides are 12dm and 18dm and the distance between them is 9 dm.
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parallel sides 12dm=120cm
18dm=180cm
height=9dm=90cm
are of trapezium=1/2*(sum of parallel sides)*height
=1/2*(120+180)*90
=1/2*300*90
=300*45
=13500cm^2
=1350dm^2
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