Area of trapezoids (video) | Khan Academy
https://www.khanacademy.org:443/math/geometry-home/geometry-area-perimeter/geometry-area-trap-composite/v/area-of-a-trapezoid-1
WEBAug 14, 2013 · Area of a trapezoid is found with the formula, A=(a+b)h/2. To find the area of a trapezoid, you need to know the lengths of the two parallel sides (the "bases") and …
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