Question

what is the formula to find the volume of a rectangular prism

Answer 1

V=lwh

Answer 2

Here's a trick for remembering the formula for the volume of a rectangular prism

There is a rectangle at each end of the prism. What is the formula for the area of that rectangle (both are the same, we just need one area)

Right: Area = length times width

Now, to get the volume of the prism, we just need to multiply that area times the height

Volume = Area times Height
Volume = length * width * height

By remembering this trick, you can do any prism.

What is the volume of a triangular prism?

What is the area of a triangle?

Area of Triangle = 1/2 * base * height

Multiply the area of the triangle by the length of the prism and you have its volume

(That's confusing, we have height of a triangle and height of the prism)

Volume of Triangular Prism = Area of Triangle * Height of Prism

Volume Triangular Prism = 1/2 * base * height * PrismHeight

If you know the formula for the area of both ends of the prism, you can multiply that area times the height of the prism to get the volume.

Too many words?