Unveiling The Remarkable Discovery Of Pi By A Genius - Prepare To Be Amazed!

If you are a mathematician, this video is not for you. If you are a visual thinker, this will explain everything your Math teacher left out!

When you find out how the value of Pi was discovered, it will change your whole idea of Math and Geometry. Teachers tell you that Pi is about 3.14 but they never explain why. Visual thinkers need things explained in another way and this will explain it so you go OH! Now I understand!

Follow the instructions and you can make your own Archimedes discovery of Pi to amaze your friends with.

With award winning children's author and illustrator, Shoo Rayner

Rotring Tikky Graphic Pen

The Pentel Aquash Brush

Huion A4 Tracing Light Pad

The Seawhite of Brighton a5 travel journal

The Cotman sketching watercolour set

Neutral Tint Half Pan Watercolour Paint

Naples Yellow Half Pan Watercolour Paint

Sharpie White China Marker

Pentel Brush Pen

Faber Castell Polychromos Pencils

Shoo Rayner is an award-winning illustrator and author of over 200 books for children.

The Shoo Rayner Drawing Channel won the 2011 YouTube NextUp award.

[yaish]

This is is the best explanation of pi I've seen so far, that too the explanation was by one of the best artists. And the drawings were simple yet elegant, I'm impressed and you have caught my attention

[kevinkasp]

I figured this out in 4th grade by experimenting with various coins as my “wheel”. We hadn’t learned fractions yet so all I could say was “the distance around a circle is a little bit more than three times the diameter.”
Well actually I didn’t know the word diameter yet so it was “A little bit more than three times across the circle.”

[joshuabardon]

This is put together very well! You always sound so happy while talking about all this which makes it feel very welcoming

[KENG-mfpl]

This is the most logical explanation of pi

[richblaker]

That really is truly astonishing... I had no idea Pritt Stick was even around in Archimedes time...

[paulsinclair]

Archimedes didn't do any of this. This was known *long* before him. Whoever first noticed that the ratio of the circumference of a circle to its diameter was the same no matter how big the circle is lost to pre-history. Understanding why this was so came from the Greeks, but also well before Archimedes - though they didn't have a rigorous concept of arclength, so couldn't fully prove it (that only came in the Renaissance). What Archimedes did was show that the *area* of circle is half the product of its circumference and radius (thus deriving the pi r squared formula). He used an approach of refining approximations that must later would develop into calculus. He then also used similar methods to find formulas for the surface area and volume of a sphere, which was his proudest accomplishment.

[johncraig]

Great explanation and demonstration! I could wish you had pointed out that pi is *approximately* 3.14. It isn't 3.14.

[danielparsons]

I thought it was a complex question and in fact I found a beautifully simple answer in this video. Thank you. Consequently I've now subscribed.

[TheTimeProphet]

I have never seen Pi explained like this, like ever. Even though I knew what PI was, this was a really clever explanation.

[petestevens]

This is a really nice explanation of what Pi is / where it comes from. It is NOT a demonstration of how Archimedes determined a more precise value than "a little more than 3". Pi is only approximately 3.14, and Archimedes didn't have access to numbers written in decimal form anyway - they hadn't been invented yet. He was able to work out (using a very brilliant geometric method) that the number of diameters it takes to equal the circumference has to be between 3 10/70 and 3 10/71. That was enough precision for him, and it gives us 3 1/7 (22/7) which is about 3.148. Would love to see you make a video showing that method!

[PlaywithJunk]

We did this in school. We were told to make cardboard discs and to use a piece of string to measure the circumference. Then measure the diameter and divide the first number by the second. No matter what the size of the disc was, the result was always close to 3.1.

[HenrikMyrhaug]

I always learned: "Circumference = π • diameter"
I always thought everyone understood pi as being the ratio between the circumference and diameter of a circle, but this video brought back a memory.
When I first saw someone write C=2πr, I was so confused why they used a more complicated and abstract formula. C=πd is so much simpler and tells you explicitly what you showed in this video.

It makes sense if you learned C=2πr, you wouldn't get the same intuitive understanding of what pi is. By the way, I would recommend you measure the diameter instead of the radius, because measuring the diameter gets you a smaller relative error of the measurement.

[timl.b.]

Gotta respect Archimedes working that out. But you know what, I gotta respect at least as much the people who made nice round wheels out of boards.

[educatedtraveler]

I can't believe I have not seen this until now. I will definitely do this with my 4th and 5th grade students. Thank you so much.

[outthinkersubliminalfacts]

The 3.14 constant comes from: whenever you divide the circumference of any circle to its diagonal from the center; no matter how big or small the circle is you always get 3.14

[legendaryfailure]

This is the best explanation, and I refuse to learn anything else any other way

[joemontiel]

I wish there were more teachers like this guy!

[megadismayed]

Although this knowledge was out there, I learned something new at 65 and this is a new learning. wish the teachers - back then, used this theory

[speedomars]

The story is a bit more complicated. The Egyptians and the Babylonians understood this ratio too. But it was Archimedes that determined the ratio more precisely. Archimedes did not name it however. According to Petr Beckmann's A History of Pi, the Greek letter π was first used for this purpose by William Jones in 1706, probably as an abbreviation of periphery.

[thomasharding]

OK. You caught the "mm" ! Very good and it was fun watching. Thanks