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Lesson 2: Volume of rectangular prisms

# Measuring volume as area times length

To calculate the volume of a rectangular prism, you can multiply the dimensions (width, depth, and height) together in any order. For example, a prism that is 2cm wide, 3cm deep, and 4cm tall has a volume of 24 cubic centimeters. Created by Sal Khan.

## Want to join the conversation?

• Can't height also be called depth?
• I guess? But it would be kinda depends how you look at the cube.
• why did he put the same answer even though he got the answer with (2*4)*3 and (4*3)*2
(1 vote)
• It is because of the associative property of multiplication. It states that the place of the parentheses doesn't matter and will equal the same answer.
• Can height be depth.. orrr?
• yes if you go down not up I guess
• I have a question...
How do I measure volume, on a 7ft width of a rectangle,a 9in length, and a 2ft height?
• Multiply 7 by 9 by 2. Formula is w times l times height. Plug in the numbers and you will get 126
• How can you find the volume of a Decagon
• You can't. A decagon is a 2D shape, and you can only get the volume of things that are 3D
• how do you measure oval
• Its basically a type of circle so I think pi
(1 vote)
• cant length be height.
• Depending on which way you think about it, yes, length can be height.
• @, why is he saying square centimeters when calculating the individual slices, but then saying cube centimeters when giving the final answer? Aren't all the individual units actually cubes? If they are not, then at what point do they transition from square centimeters to cube centimeters?