Mathematics is found in insight, and not in computation. Forgot the mathematician who said that.
@MrCalist3r4 жыл бұрын
Why do schools skip true understanding? math classes today are just; here’s formulas! and rules! now put these 100 problems into your calculators.
@exhalerwolf12724 жыл бұрын
For anyone wondering where 2πr came from, π is DEFINED as the ratio of the circumference to the diameter of a circle, π = circumference/diameter diameter = 2 x radius = 2r So, circumference/2r = π Multiply both sides by 2r and you get Circumference = π x 2r or 2πr This is not proof or anything, just the fact that π is a special number and a ratio and also an irrational number (cause the ratio of two rationals would never produce an irrational, one of them must be irrational, in this case it's the circumference. Hence it must have π in it's formula)
@uncleteam4 жыл бұрын
EXHALER Wolf Still begs the question how to measure the circumference? The whole purpose I thought was not to have pie 🥧 in the final conclusion. 🎰
@exhalerwolf12724 жыл бұрын
@@uncleteam A circle is effectively a polygon with infinite sides. First values of π were measured with polygons that had stupid amount of sides. So no matter how many sides you add, you can never truly 'measure' the circumference of a circle. There will always be error. So the best way is to define a ratio of the total perimeter to the longest diameter as some number (π) that approaches a value 3.14159... but never ends or repeats itself. So the best way to measure circumference of a circle is to measure a quantity that is rational, therefore can be measured with much more greater accuracy, the diameter or radius and use the appropriate formula to get an accurate enough result. Numberphile concluded that only 39 digits after decimal of π is needed to calculate properties of a circle/sphere of size of the known universe with an error comparable to the diameter of a hydrogen atom. Yet our computers have calculated up to trillions of digits after decimal.
@brain0nfire4 жыл бұрын
It's so intuitive when you use a piece of string to surround the circle and as you spin it into a straight line you just compare to the diameter to realize it's ~=3.14 bigger. The string makes it so practical, you barelly need numbers to work it out, as long as it is proportional.
@alvarogoenaga39654 жыл бұрын
You still have to demonstrate that the ratio between the circumference of ANY circle and its diameter is a constant (π).
+undo.kat you can say, where the base came from, since he compared it with the circle. And you can say, where Pi came from, since everybody learns it in school. You really want the proof of Pi? Ask your teacher about it, since things like Pi, e, Sin, Cos, Tan and co are constants, that no one dares to doubt. lol
@anyamram6 жыл бұрын
Nice explanation
@pianoplaynight4 жыл бұрын
+ Beethoven music in the background 😊
@retiredtom16544 жыл бұрын
I wish that teachers explained it in this way when I was in school. This explanation was very clear... Thanks!
@mr.schloopka11244 жыл бұрын
We did this and it was in the book as well
@Minuey4 жыл бұрын
@@mr.schloopka1124 i never learned this until now. Im currently taking calculus 2. more often than not 2 year olds would compare the 4 corners of a square and add up its angles, 360°, to a circle, and jokingly say "sEe? a SquaRe iS eqUAl tO a CiRCle"
@harshitpankaj84192 жыл бұрын
@@mr.schloopka1124 yes this was in book but not in this manner
@irish33539 ай бұрын
Interestingly, this is basically a calculus approach to the question. Take the integral of the circumference to get the area.
@philburch19704 жыл бұрын
Why the HELL didn't they teach the basis of things like this in High School. It is so much easier to understand the formulas when you can see where they come from.
@MSloCvideos4 жыл бұрын
They did, though. What he is doing is using limits to get a definite integral. This is all done in highschool, it's just not animated like this.
@andrewqzx38304 жыл бұрын
MSloCvideos wasn’t for me, teachers just tell u it’s pi(r^2) and that’s it, I’ve never seen an explanation before KZbin
@poopswagtyrone75434 жыл бұрын
@@MSloCvideos no, teachers tells you the formula, but doesn't explain how you get the formula, which makes it confusing for students.
@vascomanteigas94334 жыл бұрын
@@poopswagtyrone7543 This video replicates the original proof given by Archimedes.
@keksitzee10944 жыл бұрын
@@MSloCvideos - Sounds like you had a teacher that cared to explain why. Many people don't have such thorough teachers.
@NoosaHeads5 жыл бұрын
An elegant, simple and entirely understandable description. If I'd had you as my teacher, all those years ago, I'd probably have ended up as a mathematician.
@CStrik3r4 жыл бұрын
And this is what pisses me off about modern education
@gabrielrabelo69824 жыл бұрын
@@CStrik3r care to explain the other flaws you perceive, as well as your solutions/ideal scenarios?
@gaaraio27712 жыл бұрын
@@gabrielrabelo6982 teachers vomit formulas and concepts like it is all but a memory game. True learning and understanding comes from logic. Without rational discourse no learning is taking place. But more important than rational teachings is to encourage the student to become an active learner. They must learn how to learn - that is, to seek the truth behind the theoretical framework of readily available conclusions (instead of becoming satisfied with knowing the formula of the area of a circle, to learn the process behind it by their own volition and curiosity, for example). That way, I believe the average student could likely finish learning effectively the entire curriculum behind their college major three to four years earlier than it is expected today (they would already finish highschool content before the age of 15, and finish the equivalent content of a college major by the same time someone today would start college). Sal Khan did exactly that when he was accepted into MIT - in 4 years he completed a triple STEM major in math, CS and electrical engineering by not going to any class at all and just learning by himself through the books. The degree of time effective study an active learner holds just makes for a far better use of their time spent studying than a passive student who keeps expecting to be spoon-fed the knowledge from your usual school and college classes. I myself enrolled in a top business school but I never tried to pick up the reference material up until the last year in college. I started reading from start to finish the main bibliography before the scheduled classes, and kept reading the material instead of attending, and in a week I could cover the whole content from 100 hours of classes and beyond. Many others who lived a similar experience to mine can attest to my following statement - that is, 4 months is more than enough for an active learner to cover the whole finance major, instead of the scheduled time of years.
@imhopelesslyaddictedtofent42662 жыл бұрын
@@gabrielrabelo6982 ⬆️
@teixopoison6012 жыл бұрын
@@gaaraio2771 brasil é assim mesmo
@CiRdy34 Жыл бұрын
3 minutes, easy to follow for anybody, voice is crystal clear, video graphically helps with understanding… 11/10 video.
@malejeeck4 жыл бұрын
2011 YT: people aren't ready .. .. .. 2020 YT: the time has come!
@maxhaibara88284 жыл бұрын
Because of online class
@Until_It_Is_Done4 жыл бұрын
Your account is only 5 years old. How would you even know if it was recommend in 2011 or not? 🤦🏾♂️😂
@bounyh5084 жыл бұрын
@@Until_It_Is_Done Account was made in 2010. You can check view velocity using Vid IQ. or are u indians too poor to afford that shit?
@Until_It_Is_Done4 жыл бұрын
@@bounyh508🤦🏾♂️ click on his name ya idiot! it says "joined 5 years ago". 😂😂 so Tabby boi, are you stupid or just stupid? 🤭
@user-bh6cz8kp4q4 жыл бұрын
@@Until_It_Is_Done Jesus, are you stupid? It litteraily saids video made in 2011. Are you blind or stupid? Probably both.🙄🤦♂️ Did your parents drop you om the head when you were a kid?
@toiletpaper35364 жыл бұрын
My whole class found it so satisfying how the triangles just for perfectly together xD
@alvarogoenaga39654 жыл бұрын
I know, right. Like the proverbial puddle of water fitting into the pothole.
@chillshobe81474 жыл бұрын
They showed this in your class? Lucky bitch
@joselimon518112 күн бұрын
My class did too, it was smooth
@nuke12104 жыл бұрын
2019: memes 2020: memes and a little bit of math
@suzusuzujuicy4 жыл бұрын
i was expecting you here, engi
@faziranoor8 жыл бұрын
This made me understand maths like 10000000x better THANK YOU
@9b.12.jagatjibanparida65 жыл бұрын
niceeeeeeeeeeeeer video
@dekogg4 жыл бұрын
I read: this made me understand maths 100000x better THAN you. lol
@seeseefok76594 жыл бұрын
@@dekogg lmao, don't think maths as a competition my dude, think it as a topic that we can all share joy with each other
@sunitavyas8570 Жыл бұрын
Any legend here watching after 12 years 🤣🔥
@danatabrish8 ай бұрын
Yes I am here 😂😂😂
@lodgechant6 ай бұрын
Me too!
@HANDLEPRINCE6 ай бұрын
I'm watching in 2025 😂
@SlavojZizekabcd5 ай бұрын
13 actually
@o0JTM0o-s9r2 ай бұрын
Even later
@CombaOsu8 жыл бұрын
But he used comic sans
@i_found_bacon55618 жыл бұрын
Lol
@howtungchong1748 жыл бұрын
why using comic sans is wrong
@Zack-xz1ph6 жыл бұрын
comic sans is just tacky, if you still like though I recommend "Comic Neue", it's a more professional looking comic sans
@rurukado6 жыл бұрын
I find this hillarious bcs my math teacher uses comic sans when making our test paper lolol
@sudhachoudharychoudhary67845 жыл бұрын
Fckk
@preetijadhav65744 жыл бұрын
Had I learnt math this way in school..I would have been an physicist.. Absolutely easy to grasp...Fantastic.
@mrjhdsb2 жыл бұрын
the kids in my class love this video. You are the greatest youtuber of all time. the end
@mathematicsonline2 жыл бұрын
Wow, thanks!
@cesarbuenobustamante53014 жыл бұрын
I solved it with other way. I found a formula to the area of every regular polygon, adding the areas of the triangles that the polygon is made of. The result: A=d*b*n/2, where (d) is the distance between the centre of the polygon and the centre of one side; (n) is the number of sides; and (b) is the lenght of the side. The area of a circle would be the limit of that formula when (n) tends to infinite, b would be the circunference split for the number of sides, and d would be the radio. If you solve that limit, the answer will be pi*r^2. Sorry if my english isn't good, I'm peruvian. Good video!.
@jamminoutrexan54749 жыл бұрын
Thank you so much! The animations helped with the explanation, and the explanations were spoken at a good rate. I admittedly had to rewind the video at about 2:24, but after that, got the concept clearly. Great video!
@pratapmistry76592 жыл бұрын
Man biggest mistake of my life is watching these videos after 11 years ...🤯🤯
@DeshBhakt-t3cКүн бұрын
Why? Is it possible that you have lost everything just like me? 😁
@ap-pv7ug4 жыл бұрын
The beautiful thing about this is, the mathematically rigorous way of solving this question using integration is essentially the same thing. What you did at 1:05 is exactly what a Riemann sum does.
@sekimpiderrick10535 ай бұрын
This is the clearest explanation u can get online. Thanks
@KarRebWil12 жыл бұрын
This is such an excellent explanation of the Area of a Circle. I show my classes this video each time I teach this topic. Thanks a million!
@harishkulkarni7244 Жыл бұрын
You're a good teacher if you are looking up how to explain the area of circle to students! I knew the formula but wasn't sure how we arrived at the formula so this video explained it very well. Good luck.
@Dubdubwubbalubba1Ай бұрын
What a good teacher
@wangshuoleon44004 жыл бұрын
I learnt this when I was pupil, I still remember the teacher told us use the scissor to cut the circle. A few days later, she brought a cylinder, broke into pieces and combine to a brick. Teaching us how to compute the volume. I have to say the scientific education is so great in China before university
@spicedkitcat4 жыл бұрын
bro our math teacher sent us here when the teachers get tired of sh!t
@gacharaatheweirdo28144 жыл бұрын
Kitcat uwu same
@bikashkc72284 жыл бұрын
Same
@geeza48233 жыл бұрын
Fucking shit maths
@archivaldogutierrez74399 ай бұрын
My god pure gold !!! 😮 I was forced to learn the formula , but i coudnt understand where it came from , many thanks for this eye opening class
@dsavoy669 ай бұрын
Las demostraciones geométricas son un lenguaje simple y visual que acompañan a la demostración matemática que es más abstracta y compleja de entender , dándole apoyo a su comprensión y sobre todo a su aplicación práctica en el mundo físico
@stanleycates19722 жыл бұрын
All my years I have taken these wonderful formula for granted. Understanding the hard work done in early times is very interesting and would help understanding calculus down the road.
@lodgechant6 ай бұрын
Watching - and working through - your elegant, accessible video was exhilarating. It took me about 15 minutes of noodling around on a piece of paper, exploring your ideas, and I now finally understand in a very pragmatic way the fundamentals of the relationship between pi, circumference, diameter, radius and area. A thousand thanks!
@jennievan78448 жыл бұрын
Thank you so much! This was so helpful and I got it right away! Your explanations are very clear
@sarinaisnain81165 жыл бұрын
Area of circle: π x radius x radius Area of semicircle: 1/2 x π x radius x radius Area of quadrant: 1/4 x π x radius x radius Circumference of circle: π x diameter Perimeter of semicircle: π x diameter Perimeter of quadrant: π x diameter Am I right?
@AnisurRahman-hf8mw4 жыл бұрын
I discovered this same idea independently when i was at 16 years old in my own interest. I am happy to see this video today. Unfortunately now i am a medical student due to my parents interest!
@stuffido15363 жыл бұрын
@Bantai Rapper lol, you just had to one up this guy. Were you jealous of him or something?
@featherycoffee14013 жыл бұрын
Indian, makes sense
@el6ment02 жыл бұрын
@@stuffido1536 pretty sure hes joking lol
@IsaacAsimov19927 ай бұрын
The world needs good doctors. Glad you went the medical rather than academic math route.
@someonep33133 жыл бұрын
Dude your the only man that can use a simple voice and music and get me so amazed and invested into math LIKE BE MY TEACHER PLZ
@alburnto5 жыл бұрын
Damn! Thank you, I was mistaking the circumference of the circle for the base. Appreciate the effort and clear explanation.
@vadkaa50535 жыл бұрын
You can do that (base= circumference) but then ur height will be quarter of the diameter (D/4)
@vaasukrishnan83212 жыл бұрын
The best explanation for area of circle I have ever seen. The perfect animation is cerry on top.
@macdermesser5 жыл бұрын
Nice. Is there a similar way to envision the formula for the circumference, which you use to get the area formula?
@lunairenic Жыл бұрын
thank you so much, you taught me more than all my math teachers. honest.
@Henil-S-Mokani2 жыл бұрын
It can also be like - Area of a Circle = Area of a parallelogram = base × height = 2(pi)r/2 × r = (pi)r × r = (pi)r² . It is good for making models because dividing in smaller parts is harder.
@yiutungwong315 Жыл бұрын
❤😂🎉😢😮😅😊
@yiutungwong315 Жыл бұрын
π = 2 in Riemann Paradox And Sphere Geometry Mathematical Systems Incorporated...
@vibhakumari21523 жыл бұрын
WOW...THE WAY YOU PRESENTED THE VIDEO IS AMAZING....👍🏻👍🏻:)
@jacoblamothe9895 жыл бұрын
This video literally brought me to tears. Something about deriving the area of circle makes me remember the time I spent with my mother when I was little.
@calvinlee11274 жыл бұрын
Who got a bigger slice of pizza than?
@RM-sy8oo4 жыл бұрын
the thing i like most about this video is that you don't need the audio to understand it, the visuals are enough
@jennaestep61797 жыл бұрын
Thank you so much. This helped me understand one of the topics for a test a lot more than I did before. Great video!
@richardwallinger16833 жыл бұрын
wow you made that sound so darn easy .. excellent narrative . 76 years old and still learning stuff.
@sigmabond12899 жыл бұрын
dis was really gr88!!! I wish ppl kept making such wondrful vids
@mzg1479 жыл бұрын
+ishan bhange I wish you improved your spelling.
@wilhufftarkin85435 жыл бұрын
Dis was really greightyeight?
@pesto91864 жыл бұрын
Bruh too many abbreviations. Just use normal English
@_J_i_N_x_s_u_r_p9 ай бұрын
I've never had anyone explain it this way, this is too good
@yohannesyebabe79235 жыл бұрын
p*r^2= 2*integral (sqrt (r^2-x^2))dx from -r to r. This complets the proof!
@yohannesyebabe79235 жыл бұрын
@@yesdcotchin you mean dx?
@alvarogoenaga39654 жыл бұрын
Yep. But this is the same without using integrals.
@venkattex13 жыл бұрын
Excellently explained. My kids learnt in a minute. Many Thankx.
@roygbiv17610 жыл бұрын
it is easier to understand the area as the addition of all of the circumferances of smaller circle within it: the intergral of 2pie*r with respect to r. but still great video and great channel
@neurofiedyamato87635 жыл бұрын
No, that is not easier to understand. That requires calculus which many find rather difficult. This video can be shown to a middle schooler and they would understand it. So this video is easier to understand
@theodiscusgaming39094 жыл бұрын
@@neurofiedyamato8763 that is calculus but not really, what you end up with is a right triangle with base R and height 2(pi)R. You just have to calculate the area based on this.
@MSloCvideos4 жыл бұрын
@@theodiscusgaming3909 how do you prove that the area of the triangle is indeed the area of the circle?
@theodiscusgaming39094 жыл бұрын
@@MSloCvideos same as the video. The collection of rectangles approaches a triangle as they become smaller and smaller.
@MuffinsAPlenty3 жыл бұрын
@@MSloCvideos You don't. It's an assumption. Or rather, it's a definition. What does the area within a curved region mean? We _define_ the notion of area in a curved region so that this method works. This is an extremely reasonable definition because of what AyyMD VEGA said - we can see that as we increase the number of triangles we use, our intuition of what the error is gets arbitrarily close to 0. We just say, then, that this is what area means.
@JuhaKona4 ай бұрын
every time i watch, i end up smiling and learning something new!
@MegaMoh4 жыл бұрын
All people here saying pi by definition is the circumference over the diameter but no one is mentioning a proof or reason why that ratio is constant :/
@MegaMoh4 жыл бұрын
@dalia rosstom I can't just "define"(a very overused abused term) a number to be the ratio between the length to width of a rectangle. There isn't just 1 ratio; a rectangle can have lengths and widths with different ratios relative to one another. Why wouldn't the circle be different? You should prove that the ratio of the circumference to the diameter is always constant.
@deezem52943 жыл бұрын
@@MegaMoh The radius of the circle is always the same
@deezem52943 жыл бұрын
@@MegaMoh pi couldn't change. It will be different only if radius is different. However, that will not longer be a circle, as the definition of circle is "A circle is the set of all points in a plane that are *equidistant* from a given point called the center of the circle"
@deezem52943 жыл бұрын
@@MegaMoh definition of rectangle: "In Euclidean plane geometry, a rectangle is a quadrilateral with four right angles. It can also be defined as: an equiangular quadrilateral, since equiangular means that all of its angles are equal; or a parallelogram containing a right angle." It only specifies the angle, not any ratio or dimensions. So you can push and pull until length to breadth is 31469420^31469420:1^-1000 but it would still be a rectangle if its angles were the same.
@MegaMoh3 жыл бұрын
@@deezem5294 you can make a rectangle that has a side's length equal to 5 and then change the other side's length. So it is possible to have a 5x2 rectangle, a 5x3 rectangle, a 5x4 rectangle, a 5xN rectangle where N is just any number. You should prove that a circle with a radius = 5 can not have a circumference of different lengths and can only have 1 length. That is an assumption that you should prove.
@pinaymathteacher12883 жыл бұрын
I prefer your presentation because it is done slowly and this is how i also present this lesson in class especially for elementary students.
@hazmatic16734 жыл бұрын
my bloody teacher made me watch this
@curlylion-animalloverchann62712 жыл бұрын
Thanks for explanation, this was awesome!
@jmxert6650 Жыл бұрын
Ok now the math is mathing..
@arnoldrimmer91615 жыл бұрын
Superb visualisation for people who struggle with the 'standard way' of doing math. Well done love it!
@Amitsahu123403 ай бұрын
Who is in 2024
@khushisidea797927 күн бұрын
Everyone is in 2024... 😅
@TiumOnChilling4 күн бұрын
Just got in a new unit
@MithunNath-ih6tiАй бұрын
I love your channel so much, and you!!! May God bless you!❤🎉
@davidprock9044 жыл бұрын
Bleeping Love it, explained Flawlessly Perfect !
@edmondtt3 жыл бұрын
This presentation is clear and cool! This is much more important than applying the formula repetitively without knowing the proof in school..
@nameless46308 жыл бұрын
This made everything so clear for me! It to totally blew my mind XD I mean I had always memorized the rule but I never actually knew why we have that rule. Thank you so much
@vibrane88003 жыл бұрын
bro u nailed it mine teacher wasnt able to understand me this concept and in just a video of 2 mins u made me clear like ever u are op
@RetroGamingClashOfClans6 жыл бұрын
and you also should say what pi actually is which is basically how many times the diameter(radius * 2) fits into the circum. and that ratio is pi and the reason pi is infinite is because "a circle is when a line/multiple lines connected reaches infinity", so the ratio can never be one exact number.
@misconception93305 жыл бұрын
@The Revealer pi actually can not be infinate, only if it's imaginary. Since the angle restriction between 2 each lines will eventually come down to a planck length (1.61622837 × 10^-35 meters).
What software are you use for making this video? Please reply
@jamesdesantis94207 ай бұрын
Thanks so much - great video! I've seen this argument in textbooks, but this video is so much better. I'm a teacher and I showed this to my geometry class - it made it very clear to them!
@jbrittsun10 жыл бұрын
Can you tell me what software you used to create this video?
@TheJeffDGorman9 жыл бұрын
I'd love to know this answer too!
@guanyuwu87336 жыл бұрын
Same u would want to know
@guanyuwu87336 жыл бұрын
I*
@Dubdubwubbalubba1Ай бұрын
I also want to know
@danielwalker47024 жыл бұрын
The best visual demonstration of the area rule I have ever seen, fantastic!
@carlomikaa8 жыл бұрын
I learned in a different way
@adityasatpathy_a93543 жыл бұрын
in what way
@youmirinbra4583 жыл бұрын
My mind just exploded. First time I actually get why the formula is the way it is, before that I just took it for granted.
@garyesken97464 жыл бұрын
Pie r square. Everyone knows pie is round
@Bladerunner49247644 жыл бұрын
🤣
@user-wq9mw2xz3j4 жыл бұрын
ahhaha why have I never heard of this. It all makes sense now
@silverdrillpickle75964 жыл бұрын
Gary Esken Yes; Pie r round. Cobbler r rectangle.
@Amb3rjack Жыл бұрын
Utterly magnificent explanation and easy as pi to understand . . . . . . (Sorry, couldn't resist, even if it has been said hundreds of millions of times before)
@teacherdollie9009 жыл бұрын
awesome video, love it! Thank you for making this video.
@annettemroskam7450 Жыл бұрын
I love this explanation and the visual. Two tweaks would improve it: > use different colors for the two halves of the circle (one for top, one for bottom) > The twos don't "cancel" out - 2/2 simplifies to 1. This language change is subtle but significant.
@HANDLEPRINCE6 ай бұрын
Legends come here in 2024
@apik244 жыл бұрын
Thank you so much. Great explanation.
@hmd-gt10 жыл бұрын
now i can die in peace ! :D
@vicben15 жыл бұрын
but first go ask any or all math & geometry teachers "where does the area of a circle comes from" :D
@Mario_16114 жыл бұрын
Holy crap! Did I just understand a mathematical formula?!
@Abdullah_Osama5 жыл бұрын
this is Perfect I am goning to Show this video to MY children Edit: I will show it to my children when I have them (I am 14)
@sodahead03 жыл бұрын
This is the essence of calculus. Approximating an area under a curve by using an thin slices aka integration.
@shenniepinote50383 жыл бұрын
new subscriber here. Your explanation is the best! You make everything so easy.
@johnbrownlolvill Жыл бұрын
This is the best explanation I’ve ever gotten
@pigeonfun1771 Жыл бұрын
OMG. This video was amazing! It cleared my doubts. The animation must have taken so long. And, it is so useful. Thank you so much for the help! Keep up the good work!
@yassinahmed3081 Жыл бұрын
It was 12 years ago 😂
@pigeonfun1771 Жыл бұрын
@@yassinahmed3081 Just realized that🤣
@RESMITHcarpentry2 жыл бұрын
This is the best video of all time for understanding pi and converting square to circle area and vs versa!
@KarlPhillipBuhr4 жыл бұрын
There are not enough likes on this video. Understanding this is the basis of Calculus. Well done, sir!
@r.a.64592 жыл бұрын
Another way is to split the circle into thin concentric rings with width dr. These rings can be regarded as rectangles with area dA. The base of these rectangles are the circumference of the circle, 2πr. (Circumference of the circle is thought to be the first derivative of the area with respect to r) Area = Base × Height dA = 2πr dr ...and then perform the definite integral from r=0 to r=R where R is the radius of the big circle. You'll get: A = 2πR²/2 = πR² •
@pernia075 жыл бұрын
Thank youuuuuuuuuuuu better than any teacher :D
@semajtacobell363 жыл бұрын
After watching this video, I mathematically feel smarter.
@kindurudineshreddy-jr8uo Жыл бұрын
Excellent explanation Ultimate happiness on watching and knowing
@gentlestickman36804 жыл бұрын
I don't think I ever needed to know this. But it's 1:50 AM so yeah, it was definitely an interesting watch.
@the_huriya3 жыл бұрын
The best classes on KZbin for good understanding is "mathematics class 7 " Very nice and understanding And soo much better then this
@dara_1989 Жыл бұрын
pie = circumfence / diameter π = c/d so , circumfence = pie x diameter c = πd .. point to remember : π = 3.1415 pie is always equal to 3.1415.. ❤️👍
@Xylynx.10 ай бұрын
Wow my whole class is watching this
@dgaming56010 ай бұрын
I’m in ur class
@shujin70244 жыл бұрын
I asked this exact question to a friend and struggled with trying to find a answer for quite a lengthy piece of time. Thanks for the explanation now I know :)
@scimastory4 жыл бұрын
0:37 - 0:41 looks so satisfying!
@MerlinErdogmus11 ай бұрын
Awesome. These animations in correlation with the narration made this whole thing easy and concise to understand. How were these animations Made? Some animations look CPU/GPU intense.
@evertonoliveira75682 жыл бұрын
WOOOOOOW, That's so cool, well made and clear!! Congratulations!!
@MunnaKumar-km2ng3 жыл бұрын
Wow, it's amazing🔥🔥🙏🙏I am totally impressed to your teaching way. In my schools only say that (area of circle =2πr) any teacher cannot explain that how this formula come from?
@sodahead03 жыл бұрын
The quickest way to prove the formula is by integrating +-sqrt(r - x^2) from r to r. The first integral is integral(sqrt(r - x^2) from -r to r. And the second integral is integral(-sqrt(r - x^2)) from r to -r. Both integrals are pir^2/2 so just add them both and you get pir^2 which is the area of a circle
@reshaknarayan39445 жыл бұрын
Best explanation so far.
@Jjaxenn4 ай бұрын
Growing up, I had a real hard time with Math subject. I’ve realized just now that is because I’m a visual learner.
@sheerahtryphosa653 жыл бұрын
This is EXACTLY what i've been looking for THX sooooooo much!😁🧡