How round is your circle?! www.howround.com

[Iwastheret0]

Dudeney's dissection actually looks like it'd be a neat thing to have around...just to screw around with when bored.

"It's a square...but it...into a Triangle...WHAT?!"

[LiewDarWin]

how da fuck i end here from videos about planes

[DATWEIRDGUY1]

it looks like alot of work to draw a straight line

[jayar139]

Very interesting, Thanks for posting

[tommike65]

Why don't you get elliptical gears.

[InuvikPhil]

New idea: Build a bicycle with two "tires" made from slotted elipses, each made of intersected, sideways bicycle tires...would be so strange looking

[ephex]

VIDEOS from your BOOK ??? What the frank?

[Nati0us]

So where were the circles?

[nickbegnaud]

1:59 What is the point of this?

[frezzingaces]

Why dont you fully extend the first one?

[bmx4alx]

Can someone explain the significance of this video to me, idgi

[cclementi6]

@bmx4alx I think the point is to arouse curiosity and get you to visit the site, possibly buy the book.

[yunoletmebeanon]

2:57 reminds me of a rotary engine

[ch1ral]

The measurement of roundness book looks intriguing

[BahamaUncleLee]

What is so special about the super egg??? i don't get it

[BahamaUncleLee]

@BahamaUncleLee nvm i found the answer in the comments :)

[lifesnojoke333]

get these as toys for a kid & maybe he'll become the next einstien

[mcersosi]

Excelente



[albundy003]

2:57 ja edasi; ?????????????????????????

[ERR0R9O9]

successful troll is successful

[RubertaLang]

Fantastic, thank you! Awesome video.

[Tritonmac251]

MINDFUCK ;D



[reesk92]

i bet heart was pissed when he went to his buddies and said ive just invented a device to make straight lines and his freinds were like yeah weve got one of those 2 its called a ruler how are you anyway its been like 12 years since you started that

[chillinwitnatty]

can somebody explain the significance of the "super egg" at 1:44 and the "two-tip tetrahedron" at 1:59........

[GolumTR]

@chillinwitnatty The two tip tetrahedron has only two stable faces. Notice how it falls the first time compared to the second. It falls from face two onto face one the first time, the second time where it starts on face one it just falls down.

The super-egg is a demonstration of the same concept, two stable faces.

[LatestUFOSightings]

@chillinwitnatty Those are for trolling. They are bullshit items

[saifulisfree]

@chillinwitnatty It is based on the principle that the center of gravity can be gyro balanced in a squarish shaped egg.

[Monkeyboy92037]

@chillinwitnatty lol, u're so dumb

[MaestroAlvis]

@chillinwitnatty I think the two-tip tetrahedron has to do with how it falls. In the first video it flips to it's other leg and then falls. In the second it just falls. Not sure what the significance is.

[panicatthedisco9090]

cool story bro

[TheTraveler327]

I love this stuff, :)

[RUSSIASG]

Burn The Witch!

great video!

[iugey]

wait your book has videos in it? wow

[Kiloburn]

"Solids of Constant Width" sounds like a D&D magic item. I still want some though.

[1993GetMetalled]

2:57 = Wankel engine

[phtmexplo]

@1993GetMetalled only wankel engine turns in a circle, not a square :)

[1993GetMetalled]

@phtmexplo right :D but as it looks it could work in a square as well but i think the compression wouldn't be that good :D

[phtmexplo]

@1993GetMetalled yeah :)

[PsyK0m0nk3y]

These videos are from your book? How's that work?

[BeardAusZeus]

Really this is where engineering meets math? Because I have about 10 notebooks of derived equations that would beg to differ. This is more like where math meets toys.

[brainiacgames]

Pot smokers of the world, unite!

[tpulley]

How interlaced is your video? Otherwise very neat!

[atamotua64]

awesome...

[Mike070405]

Lmao at 2:00 *Shit Falls* -_- interesting...

[cheeriomartinez]

i am a machinist...and i want to make some of these tings on here...if only i knew the measurements...

[damasta67420]

i dont get the one at 2:00

[eminem1214]

The fuck is this ?!?!?!

[gwoodcraft]

visually stimulating

[65macky]

1:44 WTF does this prove?

[cdrocker27]

@65macky

Weebles wabble but they don't fall down.

[ekstc]

thats arousing from an engineers point of view

[bebeDesigner]

I was prepared all time for a zombie face.

[quinzecentavos]

u sure have plenty of time to spare cuttin wood, smelting shit and screwing... well.

[joecroucher]

cool vid my brain is proper screwed now

[MrRedClues]

this is mindfuck

[ninja6kid]

hope your brains wearing a condom

cause its about to get fucked!

[shully56]

Where can i buy those triangle ball thing at 2:40

[winterka100]

Help! what can I now call my square if it isn't a square? I'll need a new name for my 45 degrees now that it no longer exists.I thing I've died and gone to pedantic Hell.

[MRX123MRX]

@winterka100 romb?

[makzeiz]

deinterlace

[Reijerkolle]

de interlace your videos, this is youtube not tv.

[4rvinder]

@Reijerkolle

Shut up

[Reijerkolle]

@4rvinder Thats not how it works little dude

[4rvinder]

@Reijerkolle

It does work like that.

Your mother is a whore. She accepts payment is dutch cheeses.

[Charrasca]

Much love received here. Thank you a lot.

[DallasisaLeo]

I am completely baffled by the solids of constant width. That's just insane.

[WadaZable]

3:40 Oh way u can make line...

[DjOxymoron]

wow, awesome. and it´s awesome to be able to find it awesome, to understand there is something awesome findable ;-)

mathematics can be hated...but mathematics don´t give a fuck about that :-)

[welstijlfilms]

I published this video on the Dutch website WELSTIJL (31 may) Kind regards Sem Mallée

[yun514]

wow the square whole .that its what we use at school

[lemmehaveone]

My head nearly exploded at 3:32.

[BCRguy]

3:58 onward... havent you ever heard of a ruler? its much easier to use and set up..

[JamesThWilliams]

And much less accurate.

[BCRguy]

yes but for 99% of the world its acceptable..

besides that comment was more a joke then anything..

[BCRguy]

and if you look closely the top half of the line is thicker, meaning it didnt come back on the EXACT same line, meaning its not more precise..

[BCRguy]

4:50 to 5:00 is evidence..

[Purushadasa]

The straight line that a ruler makes is not less accurate than these, and you have failed to provide evidence that it could be less accurate.

[JamesThWilliams]

@Purushadasa

So you can holder a ruler perfectly straight. wow I guess there is no blood flowing through your hands.

[Purushadasa]

@JamesThWilliams How do you mean?

[JamesThWilliams]

@Purushadasa

This video is far beyond your level of understanding it would be best if you went back to school and studied mechanics just a little bit. There is a reason it's called mechanical advantage. Also why use a drafting table with a mechnical armature if a ruler is so accurate, because it's not at all.

[Purushadasa]

@James Your empty ad hominem attack followed by unsubstantiated statements of personal opinion without any evidence to back them up makes a completely impotent combination.

[lancefitzgiben]

inspirational

[TirianB]

"How round is your circle?"

What a stupid question. If it is not round, it is not a circle.

[oOBNOo]

There's no such thing as a perfect circle.

[TirianB]

If that is true, then there is no such thing as a circle. A circle is always perfectly round.

[oOBNOo]

What we call "circles" are always imperfect. If you use small enough measurements, sooner or later 2 diameters WILL differ. But we don't take that into consideration. No one really cares so we just call them circles anyway lol.

[Purushadasa]

If you call something imperfect a circle, then you are wrong to call it a circle.

A circle is always perfectly round.

[winterka100]

@Purushadasa By definition a circle is always perfectly round, but where does it exist?Do you know about fractals? Where does it all end if ever?

[molinobeer]

@oOBNOo

yes it is.

[oOBNOo]

No...there's not. Zoom in far enough and you'll find an imperfection in any circle. Use enough decimal places and somewhere the diameter at one point will be different than at another. Of course these measurements are very minuscule. But the fact still remains.

[molinobeer]

@oOBNOo

you are only imagining a print of a circle. imagine circle done by particles as small as electrons, making a perfect circle around a constant concentrical forces field. or even smaller particles like bosons, that soon will have all their properties described in LHC.

Comparing a circle painted paper system to a system of this kind of particles, it has a huge amount of factors to take in account, but as go down in matter, behaviours are much more defined and precise. ;)

[rdamiani]

Particles don't move in orbits like planets around the sun. Particles exist as probable locations in a cloud who's shape is defined by the standing wave that is the particle's wave function.

There aren't any perfect circles in nature, just like there aren't any straight or parallel lines. Roundness, like straightness, is a mathematical concept that informs, but down not perfectly describe. We can learn things that are useful using the idea of a circle, even if it's not possible to make them.

[molinobeer]

@rdamiani

they do exist.

[rdamiani]

@molinobeer

Not to the degree of 'perfection' that the geometric construct or mathematical concept exhibits. The difference isn't always important, but a difference does exist and can be found if your tools are sensitive enough.

[Purushadasa]

@rdamiani You posit a personal belief without providing evidence for that belief. That is shamefully unscientific of you.

[rdamiani]

@Purushadasa

Which part needs proof? The first part (which is a simplified restatement of one implication of quantum mechanics) or the second part (which is well known to anyone who does precision work with machine tools, and is why the GD&T system exists).

[BCRguy]

just to add.. planets orbiting the sun are not perfect circles either... if im not mistaken, pluto will be closer to the sun then neptune at one point or another (at one some point during its approx 247 year orbit)..

[pepene93]

@BCRguy theyre not even that close to circles. circular orbits are theoretically possible, but not practically so. theyre really all just ellipses.

[oOBNOo]

When did I say I was imagining a a print of a circle? Stop assuming things. Doesn't matter that measurements down to the particle are more define and precise. They still aren't perfect. Perfection is only an idea.

[Purushadasa]

@oOBNOo If that were true, then your own beliefs regarding circles and your own beliefs about reality would also be imperfect.

Sadly, that fact defeats ALL of your stated beliefs.

In short, you have proven yourself wrong by employing the logical fallacy of a self-refuting statement.

CONCLUSION: Perfection is real, not imaginary, but your own beliefs about perfection are imperfect and incorrect.

[JamesThWilliams]

@Purushadasa

Then it that case there are no circles because on the microscopic scale nothing is perfect.

[Purushadasa]

@JamesThWilliams You have failed to provide evidence for your personal opinion that on the microscopic scale nothing is perfect.

[Purushadasa]

Any imperfection present means that the object in question is not a circle, which means that you are measuring the wrong object.

All circles are perfect, and all objects that contain imperfections are not circles.



[winterka100]

@Purushadasa All circles are perfect? I drew one the other day and it didn't look too good to me. What else can I call it? Maybe a roundy thing.

[Purushadasa]

Either it wasn't a circle, or your perception of it was off, and that's why it didn't look good to you. I don't give a fig what you call it.

[winterka100]

@Purushadasa Where does your perfect circle exist? Are there any examples in the universe?Tell me some please. I obviously need to be enlightened.

[Purushadasa]

I'm not interested enough in you or your ignorant question to bother answering it.

[winterka100]

@Purushadasa Surely you can drag out one of your condescending pseudo scientific/ intelligent responses to my simple question .I could do with a good laugh!

[Purushadasa]

::yawn:: Nah, not interested. Try trolling someone else.

[winterka100]

@Purushadasa I appreciate that this video is very thought provoking ,however. I am still waiting for an answer to my last question.Let's keep it simple.

[UoBtExFODA]

Awesome math

[FierceDeity33]

i'd love to see a vidoe of the Gömböc

[breastplates]

That was really relaxing. 5 stars!

[hertyar]

Sweet! Thanks!

[sultaraco]

Excellent,smart.

[andrewkbradshaw]

This is wonderful