Actually that is a TRAPEZOIDAL prism. The formula for its volume is Volume = [((a + b)/2) * height] * length Where a and b are the parallel sides a and b are 6 and 8 height =5 and length = 20 Volume = [((6 + 8)/2) * 5] * 20 Volume = 7 * 5 * 20 Volume = 700 cubic centimeters
