Tuesday 2 January 2007 — This is almost 18 years old. Be careful.

Here is a “proof” that all triangles are equilateral. Can you see what is wrong?

Wikipedia lists lots more of these false proofs, including the answer to the puzzle of what’s wrong with the equilateral proof.

## Comments

stand1:28 AM on 3 Jan 2007Ed Davies6:31 PM on 5 Jan 2007Can you see what's wrong?Yes, I think so. Should I post it or would that ruin the fun for anybody? I'll just say that I thinkstand's comment above is in the right direction but not strong enough.Bolt3:00 AM on 2 Apr 2014## Add a comment: