What is Pi in Math? & Finding Circumference of a Circle - [7-5-8]

More Lessons: www.MathAndScience.com
Twitter: / jasongibsonmath
In this lesson, you will learn what the number Pi is and why is important in Math. We will then use the number Pi to find the circumference of a circle. It turns out that the ratio of the circumference to the diameter of any circle is always the same number, which is Pi - for any size circle! We can then use this do find the circumference, diameter, or radius of any circle we wish.

Пікірлер: 128

  • @ottofrank3445
    @ottofrank34452 жыл бұрын

    He deserves 10^6 subscribers! Mr. Jason is absolutely amazing teacher. He is like from another galaxy explaining how universe works.

  • @MathAndScience

    @MathAndScience

    2 жыл бұрын

    I appreciate the kind words!!

  • @RehmanKhan-qi4up

    @RehmanKhan-qi4up

    2 жыл бұрын

    I second that, same comment

  • @rissiam6709

    @rissiam6709

    Жыл бұрын

    This is funny 🤣🤣

  • @delstanley1349
    @delstanley13492 жыл бұрын

    Non math guy here, I wish I had paid more attention to this study years ago, but I'm quite glad I'm more familiar with it later in life. I never really knew the significance of pi and why there existed such mysticism about it. If you wanted the circumference of a circle someone long ago created a formula. All you had to do was plug into the formula. What's the big deal! There are formulas for many things, so why is there almost like a cult following for pi? A few years ago I'm looking at a circle. If figured I could measure the circumference of this circle by simply straightening the circle out into a straight line. I knew the diameter. So, how many diameter length lines could I get out of this circle? It turned out that I could get 3 diameter length lines. But when I tried to reattach the 3 diameter length lines and curve them back to re-form a circle I was still short in completing the circle. There was a gap. How short? Of course it was .14159 of the diameter. So now I could see how the formula was created, you could get 3 complete straight lines of the length of the diameter and a fourth line but needed only a fraction of that fourth line of about 14.159 of the diameter and thus we have the familiar 3.14159 for pi. So what? Well, we are still working with numbers and it was taught that the last little gap to complete pi, that .14159 went on indefinitely, you could go to .14159265359 for early starters. Big deal, just round the damn thing! I had no concern over an endless stream of numbers. I then saw a problem when I was trying to re-form my circle. If these decimal places were endless then that could mean only one thing. I COULD NEVER REATTACH MY CIRCLE! How could that possibly be? I could get closer, and closer, and closer, and closer and still NEVER complete the gap in my circle! I never considered a philosophical or metaphysical approach to pi. I knew the formula for a circle which included pi was a model for ALL circles, but it is almost freakish to consider that I can straighten out a circle to find its circumference, or by using a formula that includes pi which has some element of infinity that is essentially telling me that I CANNOT fully complete circle when I can clearly see (I think) in "reality" a closed circle. Pi is telling me my circle is an illusion or something. That at some level it ain't really connected! Thus it is an irrational number. At least I now see why new agers, philosophers, and certain cult groups are so fond with pi not as a mathematical tool, but as an adventure into some unknown realm and alien dimension. This is quite fun!

  • @eslamelsofany2470
    @eslamelsofany24702 жыл бұрын

    congrats for 1 million mr jason

  • @MathAndScience

    @MathAndScience

    2 жыл бұрын

    Thanks so much - almost there!!

  • @wilkyclergeot1105
    @wilkyclergeot11052 жыл бұрын

    You're a great teacher!!!

  • @MathAndScience

    @MathAndScience

    2 жыл бұрын

    Thank you so much!

  • @wilkyclergeot1105

    @wilkyclergeot1105

    2 жыл бұрын

    I do love math's teach... How could I get a certificate from you teach for math & science?

  • @panagiotiskougioumtzidis9114
    @panagiotiskougioumtzidis91142 жыл бұрын

    Great job!!! You are one of the teachers with incredible transmissibility in knowledge.

  • @lilypochnell527
    @lilypochnell527 Жыл бұрын

    You are an extraordinary teacher, Jason. You make this easy to understand. Thank you )

  • @annabozena5404
    @annabozena54042 жыл бұрын

    I just discovered you. My son struggles in math and physics. Thank you very much for posting so many great videos! New subscriber here!!

  • @242math
    @242math2 жыл бұрын

    excellent tutorial explaining pi and on finding the circumference of a circle, thanks for sharing

  • @Purplebutterflys126
    @Purplebutterflys1262 жыл бұрын

    Thank you so much for your explanations!! You make it so easy to understand !! Iam getting ready to take the teas and your videos are helping me so much, thank you 😊 🙏

  • @samuelalhassan7579
    @samuelalhassan75792 жыл бұрын

    You actually deserve it good teacher. Congratulations

  • @MathAndScience

    @MathAndScience

    2 жыл бұрын

    Awww thank you!

  • @tomfrederick6083
    @tomfrederick60832 жыл бұрын

    Might you discuss the equation 22/7 and its history? I would like to know how that ratio was determined to be pi. Was it the result of an actual measurement using a string or something of that sort?

  • @jahsay1627
    @jahsay16272 жыл бұрын

    At lest with you I can understand maths. I like how you explain the basic in simple form. Keep up the good work. Subscribe 👍🏿

  • @naderhumood1199
    @naderhumood11992 жыл бұрын

    Thank you v much indeed Sir Great video.Im send you a suloute from Bahrain 🇧🇭

  • @predator1702
    @predator17022 жыл бұрын

    Thank you teacher 👍.

  • @MathAndScience

    @MathAndScience

    2 жыл бұрын

    Any time!

  • @MooneLightEntertainment
    @MooneLightEntertainment8 ай бұрын

    *This deserves 2x10⁶ million views!*

  • @thepeach12345
    @thepeach12345 Жыл бұрын

    Hello. Is Pi (3.14) the angular curve to continue into a circle? Question - if the circle is Pi, then wouldn't the string of numbers come to repeat as soon as you completed the circle? If pie keeps going on then maybe it wasn't a pure circle to begin with since maybe it's getting smaller or bigger but in such a way that even with our calculations, we cant tell the equation is off?

  • @kurdish5862
    @kurdish58622 жыл бұрын

    I have a question!! I want to prove with the Formula Lom how fast the electron weighs towards the proton! or the weighting power between proton and electron with formula please?

  • @hanphanthidieu4718
    @hanphanthidieu47182 жыл бұрын

    Mr.Jason is the best teach

  • @ManuelCamarena0725
    @ManuelCamarena07254 ай бұрын

    You’re a genius! Hope you’re doing well!

  • @jondriyoza1430
    @jondriyoza14302 жыл бұрын

    Thx u sir. Your explanation is the best. May be you can give another option on your payment to get your lesson in my country. Indonesia.

  • @robertogiaguarino9472
    @robertogiaguarino9472 Жыл бұрын

    Best teacher

  • @vilhjalmrwt
    @vilhjalmrwt2 жыл бұрын

    I wish you were my math teacher But Mr.Chikowski was awesome to

  • @tresajessygeorge210
    @tresajessygeorge210 Жыл бұрын

    THANK YOU... SIR...!!!

  • @MathAndScience

    @MathAndScience

    Жыл бұрын

    So nice of you

  • @NidhiSinha4U
    @NidhiSinha4U2 жыл бұрын

    Hello Prof. Jason, can you please make a video on bayseian statistics? Although I am familiar with the topic, your teaching helps me strengthen my core learning ❤️

  • @shanetwilliams8376

    @shanetwilliams8376

    2 жыл бұрын

    What is that brother

  • @shanetwilliams8376

    @shanetwilliams8376

    2 жыл бұрын

    Sorry I mean sister😅

  • @shanelaws2622
    @shanelaws26222 жыл бұрын

    so i guess i have a question why is 3.14 / 4 * 16 = 12.5663706143591728 incorrect when 3.14^2 = 9.8696044010893586 is the correct answer for finding the area of a circle when PI * r^2 = 12.566370614359173 with a 4 inch diameter circle?

  • @danielacosta2145
    @danielacosta21452 жыл бұрын

    This teacher is so good my cat knows pie now

  • @buiminhmusic2935
    @buiminhmusic2935 Жыл бұрын

    Now i understand how Pi was born😂, Thank you teacher.

  • @lisalivingston9147
    @lisalivingston9147 Жыл бұрын

    Please do a talk about mapsands ales :)

  • @user-ky5dy5hl4d
    @user-ky5dy5hl4d15 күн бұрын

    A nice strange issue: a circle with a radius of two units had the same circumference number units and area in number units squared.

  • @viswanathanpr9443
    @viswanathanpr9443 Жыл бұрын

    Viswanathan Thankyou Chennai. You are from???

  • @sl-st8mv
    @sl-st8mv2 жыл бұрын

    😍👍🏻👍🏻👏🏻👏🏻so respected teachers ❤❤

  • @ideasonnotes-intp-intj6245
    @ideasonnotes-intp-intj62452 жыл бұрын

    Do u teach yards, miles

  • @danielacosta2145
    @danielacosta21452 жыл бұрын

    He belongs in them board of education

  • @firstmo7941
    @firstmo79412 жыл бұрын

    Thanks sir

  • @MathAndScience

    @MathAndScience

    2 жыл бұрын

    Welcome!

  • @ideasonnotes-intp-intj6245
    @ideasonnotes-intp-intj62452 жыл бұрын

    INTJ,ISTP I think u should teach mechanical functions of machines and there names it's a type of science like the cooling system, engines fires,and othere Graphs and names of different engines mechanical and tech .

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    circumference circle measurement

  • @johnwayne7998
    @johnwayne79982 жыл бұрын

    More please

  • @MathAndScience

    @MathAndScience

    2 жыл бұрын

    Will do!

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=56.32

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=(3.14)(4)

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=3.14(6)

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=31.40

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=3.14(12)

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=56.52

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=28.26

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=3.14(18)

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=3.14(4.5)

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=3.14(10)

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    radius 5 mm

  • @johnemanuele8695
    @johnemanuele86957 күн бұрын

    If using pi r square...if a diameter is 6 in. The radius is 3in..using pi r square...isn't solution 3.14 x 3 square or 3.14 x9..

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    radius

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    radius 2 cm

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=37.68

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=12.56

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    r=d divided by 2

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    circumference

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=31.40 mm

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    d=2(9)

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=28.26 mm

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=56.32 m

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    find the radius

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    radius 3 m

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    radius 9 m

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=18.84

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=37.68 cm

  • @lisalivingston9147
    @lisalivingston9147 Жыл бұрын

    Maps and scales

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    d=18

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=13.130

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    d=2r

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=13.130 mm

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=56.52 m

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=1570+1256

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=12.56 cm

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=18.84 m

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    r=4.5 mm

  • @ladyvenia
    @ladyvenia2 жыл бұрын

    Second ❤

  • @MathAndScience

    @MathAndScience

    2 жыл бұрын

    Hi!

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    r=4.5

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    r=6 cm

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    diameter 4 cm

  • @demrahanna7287
    @demrahanna72873 ай бұрын

    He makes this way more confusing than it needs to be.

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    r=12/2=6

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    diameter 6 m

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    find the diameter

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    diameter 9 mm

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    r=9/2

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    d=18 m

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    pi is angle of circle

  • @richarda257
    @richarda2572 жыл бұрын

    Does anyone think it's a coincidence that the 1st time God says his name in the Bible is here in Exodus 3.14? 3:13 God Reveals His Name.[g] Moses said to God, “If I come to the children of Israel and say to them, ‘The God of your ancestors sent me to you,’ but they say to me, ‘What is his name,’ what should I say to them?” 3:14? God said to Moses, “I am who I am.”[h] Then he said, “You will say to the children of Israel, ‘I am sent me to you.’ ” 15 God also said to Moses, “You will say to the children of Israel, ‘The Lord, the God of your ancestors, the God of Abraham, the God of Isaac, and the God of Jacob, sent me to you.’ This is my name forever. This is the title with which I will be remembered from one generation to the next.”

  • @mimiwillms3920
    @mimiwillms39203 ай бұрын

    This is 7th grade😭 I’m trying to go back to school as an older woman 😭😭😭

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    formula

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=pi diameter

  • @micasajoonie9613
    @micasajoonie96132 жыл бұрын

    First ❤

  • @MathAndScience

    @MathAndScience

    2 жыл бұрын

    Hi!

  • @alexanderflores9649
    @alexanderflores9649 Жыл бұрын

    a am from 7gth

  • @shanelaws2622
    @shanelaws26222 жыл бұрын

    i understand the problem associated with pi i was marine infantry and concerned about the inaccuracies in indirect fire (mortars) 3.172 is what i foundcan be representd the address is the way i found it but on that address i did not zoom the final result as far as it could go to find the number 3.172 and got 3.167 but zoomed as far as it can go i get 3.172 i feel very strong about this and i believe the responsible thing to do is try and share this again. additionally i am aware there is a formula for finding pi and it states its impossible but i have seen evidence myself that in decimal points say from 0 to 10 tenths thats 11 numbers which is to many sir and for division istead of just dropping a number subtract each decimal place so if your remainder is 1 then subtract 90 tenths which takes 9 hundreds this combined isgiving me exact values and not traditional answers sir thank you for your time also i have done a basic CAD on Blender for a turbine fan of 3 inches with eighth inch blades and 1/32 spacing using the 3.172 i got an exact fit of 60.9475032 blades and spacing or 61 rounding the cirumference up and 1/32 as 0.0312 without the five for the hundred thousandths sir. i know it is believed this is a waste of time i apologize for the inconvienience sir. I also strongly believe that it is not sir thank you. additionally i found if you divide one side of a square by four and then multiply by 16 you get the same area as the number with 3.172 so for a 4 inch diameter and each side of the square as 3.172 inches 3.172 divided by 4 and then multiply by 16 to make the segmented square equal in 16 parts 4 rows long by four rows high you get 12.688 sir the same as 3.172 * 4 = 12.688 hif you do the same thing with traditional Pi you get the same value as well 3.14~* 4 = 12.566370614359173 3.14~ / 4 * 16 = 12.5663706143591728 kzread.info/dash/bejne/gICmx9iTmrHUoto.html

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    pi

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    c=pi d

  • @bdub3871
    @bdub38718 ай бұрын

    I like everything you are teaching, thank you for this. However, I wanted to say that gravity is only a theory. Outer space is not what we’ve all been programmed to be. So I just really wonder how it would affect calculations if this truth ever gets out? How would that change up Pi if any? Many are waking up to the big lie on globe earth & space thankfully. Again, Great video, thank you

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    symbol

  • @racquelsabesaje4562
    @racquelsabesaje4562 Жыл бұрын

    L pi

  • @KwaneleMkhizeZH
    @KwaneleMkhizeZH2 жыл бұрын

    GOAT

  • @MathAndScience

    @MathAndScience

    2 жыл бұрын

    Thanks!

  • @user-fy7gx4wq3x
    @user-fy7gx4wq3x5 ай бұрын

    Read scientific facts in quran you will wonder