Triangles are the strongest shapes in the world, due to the fact that with 3 lengths of sides, only one triangle can be made. This Instructable will teach you how to make a paper equilateral triangle out of a square without any tools. I was taught how to do this a while back but I have not seen any Instructables on how to do this.

Step 1: Start With a Square.


  • A piece of square paper


  • Scissors (optional)
  • Pencil (optional)
  • Tongue (If you do not have scissors)

Yes, all you really need are your hands, a square piece of paper, and your tongue.
In my math proofs class, we had to write up a proof for this and then find the folding pattern to make the largest equilateral triangle and then prove that too haha. Very cool :)
i thought arches were the strongest shape
Nope, triangles are, why do you think that bridges have triangle shapes.
Because they're easier to build than arches.
surely a single point would be stronger than a triangle
i thought you were making a penrose triangle. =( lol<br/>
wow, sort of useful, i guess

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