Math Tricks » 2=1 http://mathtricks.org Math Tricks - Making Math Fun! Fri, 30 Jul 2010 00:59:35 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 One of the Oldest Math Tricks http://mathtricks.org/math-tricks/one-of-the-oldest-math-tricks/ http://mathtricks.org/math-tricks/one-of-the-oldest-math-tricks/#comments Mon, 18 Jan 2010 02:29:05 +0000 admin http://mathtricks.org/?p=208 Many of you may have seen this one before – it is very old (I first saw this in grade school, which makes this example of math tricks ancient!).

Yes, it is the infamous 2=1 “proof”.  Here I present it to you as a graphic an also as a video set to Beethoven’s 5th (yea – it was raining yesterday so I had a lot of time on my hands!).

First, here is the graphic of the proof:

And now for the video proof:

So that is the proof.  Can you spot where the error is?

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