V= 1/2 (b1+b2) x h x L
Volume = (area of the cross section) x (the length L)
V = [ 1/2 (base1 +base 2) x height ] x length
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the volume of a trapezoidal prism is equal to the height times the base area of the trapezoid. First you find the area of trapezoid h(a+b)/2 h is the height of the trapezoid, not the height of the prism a is the length of the top b is the length of the bottom Then you find the volume of the trapezoidal prism with this formula H*h(a+b)/2 H is the height of the prism. Multiply H by the area of the trapezoid that you found in step one.
It is the area of the trapezoidal face multiplied by the length of the prism.
Surface Area = 2 × Base Area + Base Perimeter × Length
a trapezoidal prism
A right trapezoidal prism has 12 sides. Any prism has three times the number of sides of its cross-sectional shape. A trapezoid has four sides, so a [right] trapezoidal prism has 3 x 4 = 12 sides.