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.

Materials:

- A piece of square paper

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

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/>

cool, never thought somthing so easy to think of would be posted

wow, sort of useful, i guess

Interesting.