The area of a trapezium is given by 0.5*(a+b)*h where
a and b are the lengths of the parallel sides and h is the vertical distance between them. The fact that the trapezium is isosceles does not matter.
A trapezium is a 2 dimensional object and so it has no volume.
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volume of trapezium = 1/2* (a1+a2)*h* length where a1,a2 are the base areas respectively and h is the height its a good formula but here is a easier one 1/2*(Area of top + Area of bottom)*Height*lenght
area of trapezium=1/2{a+b}h
This could hopefully very well possibly be an isosceles triangle.
1/2 h(a+b)
the formula for the AREA of a trapeziem is 1/2(a+b)h a=top side b=bottom side h=height its a good formula but heres a easier one 1/2*(Area of top + Area of bottom)*Height