What are the measurements you'd use to build a triangular prism that has a volume of 10 decimeters?

10 deciliters is 1 liter, or 1000 cm^3

so, it could be a right triangle with height and width 10cm, making the cross-section have area 50 cm^2.

So, a prism 20 cm long would have volume 50*20 = 1000 cm^3