Area of a Circle - Quick Visual Proof

[@IS-py3dk]

This was way easier than what my school taught me 😀

[@loadapish]

I barely went to school and when i did, i wasnt interested in this stuff. Now that im older im just as baffled as i was bk then. Im willing to learn now. I have no idea what pie r is supposed to mean. Im completely baffled

[@ricos1497]

@@loadapish r is radius and Pi is just a value (of 3.1415 etc) that some really clever person worked out a long time ago.

[@loadapish]

@@ricos1497 i need a brain mechanic

[@grohamfields]

That's the definition of tecmath !

[@maryh2965]

LITERALLY 😭 They make us divide a cylinder by a sphere and add the circumference of Australia to find the area of a circle

[@242math]

great job explaining with this visual proof, thanks for sharing

[@WaiWai-qv4wv]

Very thanks

[@tracyrain4941]

So glad you never touched on Pythagoras! Still have PTSD from a teacher about that! Really interesting proof, though. Tyfs. 😊

[@Metal-Josh]

A little late, but I've spent 20 years, since high school, and never got why that is til now. Thanks, I liked that

[@abishangamez6984]

btw josh (tecmath) why is it tecmath not mathtec?

[@garygreen5670]

Because it sounds better.

[@MickDavies]

I guess I'm going to go to Yatala Pies this week after this episode and all its pi talk!

[@lauramariawaugh5719]

Great tutorial thank you. Incidentally, you look very like I imagined from hearing your voice! I thought you were very blonde though. 😀

[@johnryder1713]

You should call it the tree ring method Josh

[@SpaceWithSam]

You are handsome in the thumbnail 😁😎

[@justfr4nk468]

yeah screw pokimane, let's simp for tecmath

[@wimjongman]

Thanks! I enjoyed that.

[@roberthauser5635]

👍👍👍

[@yhc5318]

I clicked cause you were in the thumb. This is a great visual method amd should cut thru some clutter. I enjoy your teaching method and I'm guessing your full time job is a math teacher at the high school level.

[@tecmath]

I am! Thanks for watching.

[@vijayakumarit2368]

This video is very helpfull I learnt a lot s sir🤘

[@shadowff6981]

Finally face revel

[@Freeman4815]

Daaaaaaamn

[@igorstranenski5418]

Good one

[@DemonsCrest1]

cool! :D

[@auricia201]

Nice!

[@july5609]

For me simple math was always easy to understand. So this video wasn't a big opening for me. I study way harder math now and that's where I have a problem XD

[@GreenAppelPie]

But but pies are round lol 😂 that never gets old

[@pizazzulous6921]

XD 😂

[@tenmiltenmil1770]

August 26th Thursday 2031 I used to know this stuff ! 🧐🧐🧐🤔🤔🤔🤨🤨🤨❤️❤️❤️👍👍👍♥️♥️♥️

[@abishangamez6984]

:0 a UK kid like me sup meong

[@meongkucing2012]

Hahaha a UK kid

[@Vigyan108Pankaj]

Nice

[@meongkucing2012]

This sound like Boris johnson. Maybe he deserve become a teacher math.😂😂😂

[@Soyyfelipe]

Nah he tweakin

[@carltontee6798]

🙏🙏🙏🙏

[@sail2byzantium]

I'm not at all clear how the rectangles were derived. Yeah, they are pulled apart from your concentric circle lines, but how do you know what their heights and widths would be--esp. as informed by a measurement using an irrational number? And for the last rectangle it seems impossible that its side length would be 2pi*R. That's the entire length of the circle's outer perimeter. If you are going to fashion a rectangle out of that, then its entire perimeter would equal 2pi*R and not just one of its sides. Confusing and unclear.

[@loadapish]

Im so confused. What does pie mean? Pie r and pie r squared... i feel like someone just blended ma brain with one of those kitchen blenders

[@tecmath]

Pi - as said - is how many times bigger the circumference of a circle is than its diameter.

[@bepeplia5086]

My brain is too small to comprehend

[@cobra7250]

If I want to know the area of a circle, I multiply the diameter times .7854. Done one step. I am lazy.

[@tecmath]

That'd give you a fairly consistent wrong answer.

[@cobra7250]

@@tecmath What is the decimal equivalent of 1/3. That is consistently wrong.

[@cobra7250]

@@tecmath It also occurred to me that using pie also gives you a wrong answer every time. Just saying.

[@rtptomot]

My pie is best eaten

[@TVS...l-_-l...]

29th like

[@lonewolf_2868]

2nd

[@billyandrew]

You lost me there. The only subject I was never able to pick up in school, beyond add, subtract and multiply, due to a physically and mentally sadistic Maths teacher, and you talk as if I already knew pie r squared, etc. The add, subtract, multiply tricks you show are brilliant, but this stuff is too much to take in. Now in my 60s, I probably wouldn't need it anyway, beyond using a tape measure and maybe my self made large compass. Thanks for uploading.

[@thoughtfortheday7811]

I reckon this video was really interesting but I have no way to know as the broadcast volume was too low. A shame, I gave up as the struggle to hear was too frustrating.

[@KXKKX]

That’s on you, volume is fine.

[@tecmath]

Thanks for the comment. I checked the sound... it seems OK.

[@thoughtfortheday7811]

@@tecmath thanks for checking. I retried the video and it came through OK. I think my phone must have been having a moment! Great video, as I thought! 👍😀

[@tecmath]

Thanks.

[@ye4702]

Why so sound so much like Daniel Andrews? 😂😂

[@rafiqhannibal9633]

And also confused

[@orac229]

Incorrect. Circumference is a finite number eg 20cm but pi is an infinite number so if you multiply an infinite number by a finite number the answer is infinite so circumference will never be correct.

[@tecmath]

"The number π (/paɪ/; spelled out as "pi") is a mathematical constant, approximately equal to 3.14159. It is defined in Euclidean geometry[a] as the ratio of a circle's circumference to its diameter" en.m.wikipedia.org/wiki/Pi

[@corvus3414]

Nice !