Volume of a Sphere | MathHelp.com
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- Опубліковано 17 жов 2024
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This lesson covers the volume of a sphere. Students learn that the formula for the volume of a cylinder is pi times radius squared times height, so the volume of a cylinder that has a radius of 10 feet and a height of 40 feet is pi times 10 squared times 40, or pi times 100 times 40, or 4000 pi cubic feet. And since pi = 3.14, 4000 pi cubic feet can also be written as 4000 times 3.14, or 12,560 cubic feet. Students also learn that the formula for the volume of a sphere is 4/3 times pi times radius cubed, and the formula for the volume of a cone is 1/3 times pi times radius squared times height.
![What is the Volume of a Cone? - [8-8-9]](http://i.ytimg.com/vi/UtZgnVf8SM0/mqdefault.jpg)
When your teacher doesn’t explain your work well so you use this random lady you found off the internet to help you with your work.
my teacher didnt explain it at all
This is my 3rd time today. I got luckey bc this had the same number I had.
Fr bruh these 2 minute videos help me way more than a full 1 hour lesson in school
Exactly why I came here
Aquari Holton WAIT SAME!!!
Can we just acknowledge how neat her handwriting is 🙃😉 🔥
I feel bad for her because people are making fun of her smile. Let her smile. She's doing her job.
drxmaqueen
Yeah I agree
I agree, no one should ever dare make fun of her smile.
It is soooo cheesey though i love it
get shut
.
I don't understand, she's absolutely adorable.
Who else is stuck trynna figure this out during corona
Me
Me
Chaes me
Why do I have to learn this in grade 6 I am gonna fail school
Hie Deem I’m learning this in 4 grade
her- exists
me- just trying to figure out how to cross cancel
it's just dividing. in this example, 27 and 3 are both divisible by 3, so she divided both of them and made it simpler.
@@CharsylleGalagala basically what she did: 27/3 and 3/3
@@otherkasaye2561 but why 3
we did this shit in grade 4 lol
@@clown6771 because you can divide both 27 and 3 by 3 (in other words, they’re both divisible by 3).
the ending smile though. XD
Haha
XD
Also me: 🙂
(bruh, dk why, but she left me a hole in my heart)
OHH GUYS I FIGURED OUT WHAT SHE MEANS BY CROSSED CANCEL!!!!!! ITS ONE-THIRD OF THE NUMBER!!! IT SAYS IT IN THE DESCRIPTION!!!!!! I hope this helped u guys heh.
nope you made it worse ive been trying to figure this out all day
@@_dominate_5214 LITERALLY
@@Kai-pv3vm PS- I figured it out but that was a long time ago I don’t remember now
I failed 😣
You are both correct and incorrect. Cross cancelling means finding a common factor of two numbers and *simplifying*. So in this example, we had 27 and 3, which can both be divided by 3 to give us 9 and 1. We divided by 3 because it is a common factor (a numvber that goes into both numbers, in this case 27 and 3).
Hope this helps.
Nobody :
UA-cam recommending video after 4 years : you might have forgotten the volume of sphere
Thanks a lot for whispering the formula to me, with that great smile! After being 40 years away from high school. Nice refreshment to my memory!
You're 58? What did you need to know this for?
Alejandro Ramon for their kid who can’t understand math
@@KawaiiKxthy or I think maybe their grandchildren would make sense, or maybe not and he had children really late.
She the reason I’m even close to passing my geometry class
Same here
good luck
Your dumb cuz my man said he has a geometry class what the hell who has a lesson dedicated to that
This is useless! What If I got a random ball from my home and wanted to find both the volume and radius of it?
@@Blenderverse420 measure it
When she cross canceled the 27 into 9 and the 3 into 1. It was just a simpler way to do 4/3 times 27/1. For 4/3 times 27/1, 27 is a multiple of 3 so you can cross multiply and simply to 4/1 and 9/1. Leaving 9 times 4 which is 36. Then add the units. Hope this helped.
I’m a bit stuck cuz my number doesn’t divide into 3 😞
Thank you for this
Thanks
This helped ✨ Thank you very much 🤞
what if there is a number that isnt a multiple of 3?
Why remove 27? Help.
She lowest termed it
@@r_ir3i yep
27/3=9
Cross canceling 😀
She simplified it so both divided by 3
I just started watching these videos and her smile alone throws me of in a good way.
Dam a 2 minute video thought me more than a 1 hour lesson
This is really helpful, thank you very much. My book has the formula but didn't discuss what they did with the 4/3.
I think when she cancelled the 27 and 3 and ended up with 9 and 1 she multiplied 9 × 1 got 9 and multiplied that by 4 and that's how she got 36
Idk if it is..
I need more details..... why did she turn the 27 to 9!!!
27÷3
When a number in fraction and the fraction of the other has the same number in the multiplication table like 3 is the numerator of the first fraction and the denomenator in the other is 27 you cross it cause the number 27 is in the table of 3 or to make it simpler 3÷27 which means 27 is 9 and 3 is 1 or ask your teacher🤗🤗
Square root?
divided by 3.
because she did 27÷3. Stop playing fortnite and study stupid kid
when she smilled at the end 🤣
So creepy
she sounds like she's forced at gunpoint to teach this
@@geepadoodle Lmao
meanie
stfu
How are you teaching me in a couple minutes but my teacher can’t In a couple days...
Because you have no freedom
My online work is due in 2 hours, this video was very helpful, thanks
the only video on the internet that helped me out on this. Thank you so much!!!!!
Y’all so basically you do take the R divide it by 3 and then take your answer from that and multiply it by 4 then just put the pie at the end
Somewhat, it’s r x 3 take ur answer divide by 4 and multiply by pie
@@alessandrasantos8541 if you multiply by 3 than divide by 3 you would just end up with 12.56 the whole time how does it work?
It might help to explain why the '4/3' is in there. That way, people won't blindly just use the formula without understanding why they are doing what they are doing.
girl what does cross cancel mean?? I'm learning this on my own cuz I'm confused. but I'm *still* confused.
she is really helpful
okay, but why she look like she forced to do this
😭
**AKWARD SMILE AT THE END**
@@rhicca.617 how thd hell did u do that
@@rhicca.617 True
@@cockroach6693 put "*" at the start and end of ur word.
for those who don't know how to cross cancel or cant do it with your given answer, just multiply the product pi and the radius cubed by four and then divide by three, after that you can proceed to multiply it by pi to get your final answer.
ty
THANK U. I WAS SO CONFUSED UNTILL THIS. THANK U🫶🫶
Thx miss now i can finish my assign. Easily!!
Hand writing is very neat
What do you do if you can't cross cancel?
just multiply and it normally without cross canceling, you only cross cancel when you can to simplify the numbers (i suggest looking at some examples of cross canceling to understand it better :) )
She's the teacher we want and the teacher we need
0:52 pls tell me where on earth did you get 9 and 1, and the reason why you need to cross out 3 and 27.
thankyou for helping me i was having trouble with the explanation in the book also for those who does not understand (3in)^3 is 3.3.3 equals 27 multiply its not hard! also don't make fun of her smile she is helping us with math while all youre attention just goes to her smile pay attention to what she explained so you guys can understand.
Why does she look like she lost all will to live?
the same reason geometry made me lose mine
XDDD
Man I understand it quickly I love this channel
yes ikr
1:05 only volume of a sphere with r=3 is 36π, this is not the same of sphere with different radius. Please be aware.
What would the actual answer be then
@@reayaniftekhar8348 Yeah
@@reayaniftekhar8348 it depends on the radius
That fake smile at the end thoe😂
I was never taught this yet and I have to do it
Why doesn't the cubed sign go away if it has already been applied?
Good question... I asked that too, when I was in High School... You might want to consider that you are dealing with volume, and it happens that the same term "cubed" is used the refer to both situations which is a transition from one determinant to another... Otherwise you would end with a linear value, however, it is volume so "Cubed".
The cubed sign stays because you’re dealing with 3 dimensions
its part of the unit
Using this to study for magnet school admissions test; wish me luck!!
Why do they cross cancel???
I'm in love with her already lmaoo
Your way of explaining is very good 👍🎉😊😊
isnt it 113.14?
how is it 113.04?
Can someone please teach me?
Sometimes the value changes depending on whether u use pi as 22/7 or as a decimal since it can`t be completely calculated
think u should use 22/7 and not decimal to avoid confusion
@@arjunthomas368 ok
How do i do yhis when it doesnt have a raduis but height?
Do you mean diameter or what cause diameter is just double the radius, so to find the radius just divide diameter by 2. Hope this helped ❤
Anyone in 2024??
yup🥸
Present
Me
yes i needed this for a math exam
Me this is my assign lment and I have no school my teacher sended it in the gc and I saw my notebook doesn't have the full formula of the sphere so I watched this and it was super ez to learn!
I have to do this for a project and we’ve only learned cubes prisms and pryimids
Yeah but what if you have a number that’s not three.....then how do you do it????
Same thing just cube it but I am stuck on wtf 4/3 means
You are very help full I didn't understand when my teacher teaches this to me in 10 days and when you teach me in 10 minutes ❤️❤️❤️❤️❤️❤️❤️❤️❤️
What is the "cross canceling", why do that and what is she actually. Taking 2 from 3 and adding it to the 7? Why?
Now i know how to solve my Math Assignment!! thanks MathHelp!!
what if you can't divide the three to the radius?
If you guys dont understand cross canceling, use the formula (4pi r³)/3 , its the same formula but just written differently
Mam if example radius is 3.5cm then volume is
She can make a really good text to speech voice👌
Thanks for giving the formula at the beginning because I didn't want to watch several min of boring example problems.
thanks for the solving I was so confused that how did they solve with 4/3
I have a question,
why did you write first 3 in cubed,
then did 3*3*3, and you got 27 in cubed?
Isn't it supposed to be just 27?
The cubed sign stays because we are dealing with volume. You can also read it as cubic inches rather than inches cubed. Basically it shows we are using a three-dimensional shape.
TYSM! It really helped me a lot!
Thanks this really helped because I didn’t understand but now I know!
really helpful for my daughter. THANKS
so why when you cube the 3 did you leave the exponent?
She is more better teaching than my teacher ;-;
True
I is still confused on what she is teaching tho ;-;
@@zoelandry2346 oof :/
What’s in?
Inches
I didn't get anything. How come ⅓ and 27 became.. 3 became 1 and 27 became 9.?
because three goes into 27 nine times and three goes into itself once
Wait, so I can fit approximately 113 inches inside of a 6 inch sphere?
how did she get 36 im confuses..
\
Thank you so much you helped me a lot living in a foreign country makes it hard to do math
aye bro good luck out there
OMG THANKS SOOOOOO MUCH I TOUGHT I NEVER WOULD HAVE GOTTON IT
Good day po ma'am ❤️ can you help me plss? What percent increase in volume is achieved by a sphere whose diameter
increases from 3 cm to 4 cm?
Wait , 3 inches cubed equals 27 inches cubed?Shouldn’t it be. 27 cubic inches? Because if it’s 27 inches cubed then you still need to multiply it by itself and itself again. I just noticed she moved the little 3 inside the paragraphs after she cubed the number 3. It is
confusing the way she worded it. And maybe use a different number than 3 while teaching how to cube a number. Just a thought. 😊
She did explain it a bit poorly, but the way she wrote it cleared it up for me, because it wasn't cubing the whole equation anymore.
Good video but next time get your calculations right=113.09 in cubed
How'd you get the 9 and 1 though?
By being simplified?
my exam is tomorrow and i have 6 chapters to cover and only 4 hours to cover
27 cubic inches not inches cubed.
did we have to cross cancel?
She sounds like she's taught this so many times, she doesn't care about sounding like she enjoys it. That smile at the end too. 💀 Inside.
Man this is better at teaching me at math the onlinechool
Who else is just watching this so there parents don't get angry at you
What would the answer be if the radius is 5cm?
@@yannymochi2009 *523.124
just plug 5 in place of the three, not the exponent three tho
Very helpful explanation thank you!
THIS HELPED ME SO MUCH
if 1/3 sphere how to calculate or cord of sphere
Thankss!!!!! Again your videos help me a lot! :)
The cross cancelling- Im so dead.
what if the question doesnt give you the radius and just says x?
Why does UA-cam exain things better than y actual teachers?😭
How did she get 36?
By 9×4
Thank you for teaching us this magic way of doing this! ☺️
V= (1 1/3 x Pi) Radius cubed
V= 4.1888 x Radius cubed
Thanks!
I
to simplify it for ppl if its 6 as diameter its 3x3x3 then after that ur answer of 3x3x3 multiply that by 4/3
THANK FOR IMPARTING THIS KNOWELDGE
Yes Thank you for this!
great video thank you it helped me so much with my homework.
How to cross cancel 27 with the 3 on 4/3?
u don’t even know how much this helped me😭 thank you i’m in 5th grade and struggling with this
This ain’t 5th grade math no way I’m in 8th doing this😱
@@xzylofied.7023 yep its 5th grade math!!
Cross cancel? What’s that?
Not sure why I'm studying this but damn is it amazing
Thank you, but a harder example would've been more useful. :D :D
boi be happy she actually fucking did it, she didnt have to do this, let her do her job bOmEr
This is so helpful thank you I'm in grade- lV but my teacher teach us in advanced
I like how she teaches !