Consider a rectangular prism with a width w, length l, and height h.
The volume of the prism is calculated by multiplying the area of the base by the height of the prism.
V = wl h
Proof
The volume of a prism can found by multiplying the base area B and height h. V=B* h
The base of a rectangular prism is a rectangle. The area of a rectangle is the product of its width w and length l.
B=wl
Substitute this expression for B in the first formula.
V= B* h ⇓ V= wl h
This process produces the formula for the volume of a rectangular prism.
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