yego.me
yego.me
💡 Stop wasting time. Read Youtube instead of watch. Download Chrome Extension

Volume of rectangular pyramids using cubes | Grade 7 (TX TEKS) | Khan Academy

less than 1m read
·Nov 10, 2024

We'll be exploring the volumes of rectangular pyramids today with cubes and rectangular prisms. This is a cube; all the sides are the same length. To find the volume of a cube, I can multiply the length by the width by the height. For example, if the length of the cube is five and all sides are the same, then to find the volume I would do 5 * 5 * 5 = 125 cm cubed.

I can break this prism into three rectangular pyramids that are all congruent. So now we have a cube that's actually made out of three rectangular pyramids, and we can see here that all of the rectangular pyramids are congruent. The base of each rectangular pyramid is a square. The square is the same size as one face of our cube, and they all have the same height.

Since all of these rectangular pyramids are congruent, they all have the same volume. To summarize so far, three congruent pyramids can form a cube, and the volume of one of the pyramids will be 1/3 the volume of the entire cube. This is true for all cubes, but what about other rectangular prisms where the sides have different lengths?

Living Embodiment of Hindu God | The Story of God
Do the ultra successful share similar characteristics?

More Articles

View All
How I make $13,800 PER MONTH on YouTube (How much YouTubers make)
So I definitely don’t want to give anyone the idea that the only reason I’m doing this is for money because that couldn’t be further from the truth, and I would be doing this regardless of how much money I make. But I have a feeling this video might inspi…
Rate problems
[Instructor] So we’re told that Lynnette can wash 95 cars in five days. How many cars can Lynnette wash in 11 days? So like always, pause this video and see if you can figure this out. The way that I would like to tackle it is given the information they…
Voter turnout | Political participation | US government and civics | Khan Academy
What we’re going to talk about in this video is voter turnout, which is a way of thinking about how many of the people who could vote actually do vote. It’s often expressed as a number, as a percentage, where you have the number who vote over the number o…
Homeroom with Sal & Kristen DiCerbo PhD - Wednesday, September 23
Hi everyone! Sal here. Welcome to our homeroom live stream. We have an exciting show! We’re going to have Kristen D’Serbo, Khan Academy’s Chief Learning Officer, answering any questions you have about motivation and having more independence as a learner. …
Can You Solve This Shadow Illusion?
We have that card with a little round hole in it, and what I want you to do is hold it up, um, and try to cast a shadow on that wall there. I want you, before you do it, to predict what we’re going to see. Shadow of the card? Shadow of the card with a lit…
Alligator Moms Are Nature's Helicopter Parents | National Geographic
[music playing] NARRATOR: What would you do if you could not chew? Did Dr. Seuss write this script or maybe Roald Dahl? [singing] What would you do if you could not chew? Simple. You just thrash your food apart. Alligators go through 2,000 to 3,000 tee…