1/2 x (sum of bases) x height
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The formulae are quite similar; you multiply base x height, where the height is perpendicular to the base. In the case of a trapezium, you need to calculate the average of the two bases first.
The volume is the Area multiplied by thickness (if the thickness is constant). Area = 1/2 ((a+b)*h) a = the base length b = the top length h = the height (constant) t = the thickness (constant) Volume = Area*t Please note that a trapezium and a trapezoid are defined differently in England and the USA. In England the trapezium has the base and top parallel and the area calculation above is for that definition but the area calculation for a trapezoid is different. The volume will still be Area*t.
1/2 ( a + b) x h
None but if you mean area it is: Area measured in square units = 0.5*(sum of parallel sides)*height
can any one tell me wat is a trapezium