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26KiB, 900x900, iso.png

Anonymous Tue 11 Aug 2015 17:46:30 No.529066 View Reply Report Delete

Quoted By: >>531576

Looking for advice on making a very plain isohedron (20 triangles)

I would want the faces to be as clean as they can be within reason.

I don't mind cutting and using glue just want to get the end result so I can paint it.

Any help would be appreciated been trying to do tabs but the final one just will not go in well.

Anonymous

Anonymous Tue 11 Aug 2015 18:08:30 No.529067 Report Delete

Quoted By: >>529068 >>529079

First time on /po/ and I know how to do this one!

Make 20 paper circles of whatever diameter you want (This can be accomplished by tracing a cup/round object).

Second step is to create an equilateral triangle that touches the interior of the circle with its tips. There are many ways to do this. Use cardboard because the next step is to trace the equilateral triangle over each circle.

You now should have 20 paper circles with triangles inscribed in them. Fold the circles along the traced lines, creating the outside faces with 3 tabs. (I hope this isn't what you've been trying to do, if so my bad. This is probably the simplest way to do this.) Glue the tabs to each other until you have a full tetrahedron.

Anonymous

Anonymous Tue 11 Aug 2015 18:13:50 No.529068 Report Delete

Quoted By:

>>529067
*Icosahedron, my bad. You can use these steps to make any of the Platonic solids

Anonymous

View Same Google ImgOps iqdb SauceNAO icosahedron.jpg, 485KiB, 2480x3508

Anonymous Tue 11 Aug 2015 18:36:31 No.529069 Report Delete

Quoted By: >>529070 >>529079

Fist of all you are looking for a (convex) icosahedron

You can use a regular woodglue to clue everything together and a no glue connection for the last flap.

here is a quick edit I did to a regular plan.

Anonymous

Anonymous Tue 11 Aug 2015 18:38:38 No.529070 Report Delete

Quoted By:

>>529069
oh the flap with the line goes inside the icosahedron and you need to fold it so the ink is on the inside.

Anonymous

Anonymous Wed 12 Aug 2015 00:01:46 No.529079 Report Delete

Quoted By: >>530869

>>529067
would be great but might be hard to do the last one without trouble. Never thought of that method

>>529069
The huge issue with this is that i want to do it on a large scale

and secondly some edges would be open while others are seamless and for me its a dealbreaker

Anonymous

Anonymous Sun 27 Sep 2015 01:02:42 No.530869 Report Delete

Quoted By:

>>529079
How big do you need this? The icosahedron can be built using a compass and ruler at any size you have paper for, but there is going to be gluing no matter what you do.

Anonymous

Anonymous Sat 10 Oct 2015 03:03:55 No.531576 Report Delete

Quoted By:

>>529066
I use triangle edge modules (3-D. Geometric Origami: Modular Polyhedra, by Rona Gurkewitz and Bennett Arnstein)

30 units folded from half squares (1x2 rectangles) make a lovely icosahedron.

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