Make a Post-it Note Dodecahedron!

[MisterRedstone]

anyone else love how British people say "zed" for z?

[GallifreyGames]

@MisterRedstone Actually, America is one of the few places who pronounce Z as "zee".

[MisterRedstone]

@GallifreyGames Ya i know, i just love hearing people say it like that.

[GiorgioCapocasa]

Love it! I'll make one in the weekend :D

[CogitoErgoCogitoSum]

How about an origami tesseract?

[MindflowAU]

I was going great until 3:10 where you said "now make 30" ! :-0

hahahah

[J0shReed]

I failed horribly. Now I have 30 correctly folded post it notes that I lack the dexterity to assemble...

[killeramaru]

Correct me if I am wrong... (because I want to try it) you used 4" by 4" post-its... each corner has 3 post its... times 30 corners.. meaning I need at least 90 post it's... this might take a while but i'll email it to you soon.

[pvskpraveen]

@killeramaru you need only 30 post its. 30 modules... not 30 corners

[lmkonzen]

the world will now have a shortage of Post-It's

[PrinceBooThang]

i dont get how to connect the three modules to eachother

[SpoonSamaXD]

This man draws the straightest lines I've ever seen, WITH A PEN.

[lordkappa]

Tried 3 modules, just to see how it worked... somehow an hour later I had a dodecahedron sitting in front of me. This project has an almost skinner-box experience, as you see the result coming together.

Thanks for the video; I now have a new desk piece!

[themissingn]

I shall attempt this. But I cannot help myself, and ask... isn't the plural 'dodecahedra'?

[affablegiraffable]

2:52 mathgasm

[MrRyanDuba]

I made a giant one out of printer paper, took me like 3 or 4 hours last night lol.

[Triplepower4]

That's 90 post-it notes!

[kurdbros]

I tried for ! hour and they still drop off!

[2003z440]

You said that the 5-color dodecahedron gave you a bit of a head-ache. You probably figured it out already, but one pretty good pattern is to match the side opposite the corner you're connecting your piece to. This will then cause the 6 pieces of each color to be opposite of each other, through the solid, and one on "top" and "bottom"!

[supermanXL]

Challenge completed

[supermanXL]

i finally got the first one done

[weldmaster80]

I regular solid??? I used to have very irregular solids, but now I eat more fiber... Problem solved

[427557]

I am making one right now :p

[muffemod]

@427557 :)

[427557]

@muffemod I watched the video on your channel and I was wondering the same, I was also having trouble getting the compounds together. :S

[muffemod]

@427557 You don't make ten 3-piece units. Instead you make a few (I made three 3-piece units) and laced a bunch of individual modules to make it.

[427557]

@muffemod Ah yeah, that could work well idd, less chance to let it fall apart. I was trying it with weak adhesive tape, I could peel it off after finishing the dodecahedron.

[HappyMemoryXD]

Can teach us how to make a great stellated dodecahedron as well?

[TheSuperMagicTaco]

can you use a full pice of papper?

[lolOrToT]

the number of dislike = the number of curved surface of this Dodecahedron

it should stay this way ;)

[allenu]

Brilliant. I know what I'm making at work tomorrow!

[gC222SA]

I wish I knew more super math teachers on youtube ): do you know any similar to yourself?

[singingbanana]

@gC222SA I did a video recently called YouTube recommendations

[sparkles78910]

what the hell?!? this is too hard :'( im so frustrated!!!!

[javalin597]

Thumbs up if Mr. Mehta Sent you!

[lmcgregoruk]

@javalin597 Pretty sure I heard him on Chris Evans Breakfast show on Radio 2 at work this morning, as the 3 minute mystery interview.

[singingbanana]

@lmcgregoruk Yes you did.

[CosteTR]

pööstit nöte

[Meundie]

I just did this.

i like, an hour - two.

YAY FUN.

[animewisher]

any one else having trouble putting the 3 corner sets all together? i have the moduals in there 3 part corner, and the 3 part corners in the 3 corner ses, but i cant get the 3 corner sets into the next set, anyone can help?

[PullarBearBear]

@animewisher Actually, what I did was I just put in individually instead of sets. This makes it much easier for me. To make your first pentagon, you combine 2 of those sets to make 4 sides. Then, you only use 1 OTHER side to join both sets together to get 5 sides of your pentagon. After that, I combined the other modules individually. Even though it's slow, it works! The video isn't really clear on this, so I got rage-mad when I tried to do this first.

[Triptographix]

It's cool how the holes are all pentagons as well. This video brings me back to my geometry and discrete mathematics course. Those crazy dodecahedrons.

[olliecamel]

I made one, it is so fun and my parents and my brother were amazed. Thanks so much singingbanana! :)

[PullarBearBear]

Can you show how to put the groups of modules together? The furthest I could go is combining the 3 modules together, then I'm stuck because you skipped to the ending.

[ComandaJoeLM]

Singingbanana rules! THX!

[18Jeebuz]

Man, you deserve so much more exposure. You put so much effort, energy, enthusiasm and thought into each of your videos and you pull it off sincerely. If I had a large sum of subscribers I'd pimp you out at the end of every video I made.

I hope you go viral soon :), you're one of the few who deserve it.

Keep making great videos please :)

[antares5245]

There's a nice proof that there are only 5 regular solids (Platonic Solids). There have to be at least 3 faces at each corner, and the sum of the angles at each facing must be less than 360 degrees.

Triangles with interior angle 60 degrees:

3*60 < 360 makes Tetrahedron

4*60 < 360 makes Octahedron

5*60 < 360 makes Icosahedron

Squares, 90 degrees:

3*90 < 360 makes Cube

Pentagon, 108 degrees:

3*108 < 360 makes Dodecahedron

Any more facing or any larger angle and you can't make a 3D corner anymore.

[08CJ11]

white man

white shirt

white room

white table cloth

white Dodecahedron

[SapphireHD5850Xtreme]

Singingbanana make a hexacosichoron :-), i think it is easy for you

[KayMa1992]

Thumbs up if you are Chinese and laughed when he explained the words SB.

[lebagelboy]

procrastination thy name is paper dodecahedron

[delyn0831]

@singingbanana you really like dodecahedra? i saw your video "how to make pop-up dodecahedron" :) it's fun to make though :) oh.. and i like your videos :) i don't get them most of the time that i have to watch it over 4 times to get it.. but very nice :)

[BrotherBloat]

that's great - I'm going to make one at work :D

[Zoidmatrix]

No dislike :O

[singingbanana]

@swinjy You need to double that (an edge has a corner at each end), there are 20 corners.

[Gameboygenius]

Oh oh! There's a small graphical error. In the recap, you've made a Z to represent a cross section of the module. And if the two outer lines are 1 length unit each, the middle on is sqrt(2) length units...

[singingbanana]

@Gameboygenius I actually was aware of that, but decided the diagram would be clearer if I made it that way :)

[LewisAM37]

i think that it's possible to make modules, that will not work with each other. if you fold one one way and another the other way they will not fit together.

[hurpderp123]

Awesome, let me get my post-its..

[DerEngelDesTodes]

Modular Origami - Best use for spare time and paper :D Do you know Sara Adams?

[SaiyanKirby]

Is it common in England to refer to the letter "Z" as "zed"? We in the US say "zee".

[wrightmath]

@SaiyanKirby I had a British math(s) professor once who said "zee" but would occasionally grumble about the fact that he'd prefer to say "zed."

[WhiteHenny]

I always said this channel needs more 'regular solids' jokes. Bravo!

[11Agamemnon235]

Cool puzzle with beautiful solution. We have a 4 by n grid (4 rows, n columns). We have a knight. We want to place the knight on a given square and then visit every other square exactly once, using knight moves, of course. Is this possible? If not, prove it so.

[antares5245]

@11Agamemnon235 You have an inner lattice of the 2x2 squares, and an outer lattice of the remaining 12 squares. Each move switches between the 2 lattices. There are 3x more outer lattice positions so a knights walk is not possible.

Thx for the fun mental problem.

[darkdudironaji]

THAT IS SO COOOOOOL!!!!!

[11Agamemnon235]

This is fantastic.

[XxtreborobertxX]

2:52 Abstergo at work

[GSA14101996]

Where u bin so long. Ps I spelt been like that on purpose

[tamsWTFvideos]

My goal for the next 45 minutes: take four sheets of paper, tape them all into one sheet, crop some to fit 4x3 units (if needed to), and this will become ONE post it for me dodecahedron.

[munchluxe63]

@tamsWTFvideos  DOOO IIITTTT!!!!

[pjbolas]

Using the same 4 by 3 piece of paper, you can also make square, hexagonal and triangular modules too.

[Lagolicious]

Can you get a smaller dodecahedron inside of a larger one, using enough colors that the smaller and larger ones will never correlate colors, and every face is of different colors?

[Speedcuber105]

megaminx!!!

[markovchaney1950]

Lovely. First origami thing I've seen that made sense. ;^) Thank you.

[nicholishere]

nope 904

[nicholishere]

in this video there is 604 sticy notes 8O

[WhiteRAZOR]

Modular Origami I see. You should look more up and do some geometric and statistical analysis on it.

Somebody did an International Baccalaureate Math Project on origami years and years ago at my school, and was one of the very few that got full marks for it.

[oEQjet]

Can you make a 3 color dodecahedron with no same colors touching? I must try that.

[singingbanana]

@oEQjet You can...

[oEQjet]

@singingbanana err wait a minute... pentagon sides...

are you SURE you can? Each color has to have 3 different colors, how would you make a pentagon from 5 corners with 3 colors each, with no color touching? I don't know why I thought they were hexagons when I posted that... maybe 4 colors is possible.

[oEQjet]

@oEQjet err... I meant to say "each corner has 3 different colors.

[oEQjet]

@CardMagicianJoeKing "Still can with 3 maybe" hey maybe you could. maybe...

Considering the ring of colors in a pentagon, red, green, blue. It could go r-g-r-g-b. An adjacent pentagon shares two colors. so maybe r-g-b-g-b. Still... I'm not sure if you can finish it like that...

[wrightmath]

@singingbanana Groetzsch's Theorem guarantees it, right?

[singingbanana]

@wrightmath Yup.

[CardMagicianJoeKing]

@oEQjet yeah, thats what i was thinking, but i dont think all of the sides would "fit" together

[oEQjet]

@CardMagicianJoeKing I went looking online for some answers. I know each module touches 4 others, so that's the equivalent of a 4-regular graph. I found a paper that made the statement that almost all 4-regular graphs have a 3-coloring. So... Hell, i thought singingbanana's remark was a bit offhanded and that he misunderstood me. Maybe he's already worked this out?

[VC112358]

If the multi-coloured one gave you headaches, you should try to build the five intersecting tetraedra. You can find it somewhere around on youtube.

[CardMagicianJoeKing]

3:37

surely you mean bottom left and top right

or am i just really confused?

[tjv323]

@CardMagicianJoeKing you're confused, think of the left side as the top, and the right side as the bottom (flip it 90 degree's right)

[CardMagicianJoeKing]

@tjv323 ah, i get it, thanks

[nelsyeung]

That's amazing! So this is what you research, instead of one of those millenium prize problems. :P

[10Dante4]

i so wanna crush that paper dodecahedron

[MOSpr0ductz]

@Singingbanana + origami = WIN

[HappyMemoryXD]

Mathematicians seems to be so free, I might consider becoming one in the future...

[redjr242]

lol at 4:08 the pink dodecahedron is white for about half a second.

[singingbanana]

@HappyMemoryXD Nice.

[RandomNinjaOfEvil]

Modular origami is awesome, check out jonakashima and adamssara for more designs

[lassefan]

LOL, you so punny! :P

[superfluousness321]

I love how you call your wee bit o' paper a module. :)

[MrWowgod]

@superfluousness321 I love how you call his module a wee bit o' paper

[Abvance]

That's something to do at work...

[MasterA55a55in]

you can tell your doctor you've been making regular solids LMAO

[thejumperkin]

@MasterA55a55in best joke ever LOL

[Butt4cak3]

I'm currently making one. I'll probably send you a video response :3

[EighteenCharacters]

@Butt4cak3 yes, yes, yes!

[LittleBlackSparrow]

i'm so glad i have post-its. i'm gonna make one

[ericsurf6]

Wow James, this is really cool...

[xXdenhartXx]

I gave up after the first module

[blo0dy9aces]

Great Video. I'm gonna have to teach this to my club ^.^

[Zomcrotic]

Now I have use for my colourful post it notes =D

[FHomeBrew]

:D

[kiIIamaim]

=D

[goncalovm96]

1st, 8th view

[Theowest]

Awesome! I'm going to try that when I come home.