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# Volume through decomposition

Sal finds the volume of an irregular 3D figure by breaking the figure into 2 rectangular prisms and finding the volume of each part.

## Want to join the conversation?

• imagine using khan academy in 2022,(plz up vote my comment so every one can see it, thanks)
• imagine cant be me
• I freaked out when I got an irregular shape homework but after I watched this video, I did perfectly on it. Before the video, I thought that I had to add the numbers together but when I watched the video, I understood that I had to break the irregular shapes apart and multiply the length,width, and height to get the volume and add both of the shape’s volume to get the answer.
• If common sense is so common, why do so few people have it?
• How do you measure how many people have common sense? I assume you are interpolating from what you think common sense means. The other issue is that we are often a reactionary people rather than a proactive people. Reactions often go aganist common sense while proactive uses more common sense.
• Does the order I multiply the width, height and depth matter to find the volume?
• No, the order of multiplication of width, height, and depth does not matter, because multiplication is commutative and associative.

Have a blessed, wonderful day!
• I don't understand. But after the video I understand it a little
• i dont understand this stuff its really hard
• just multiply length times height and widith