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Josay Permalink
March 05, 2010, 19:29

The first one is Pythagore's theorem but the colors do not help that much to understand what's going on...

The other one is something about sums like :
(1+2+...+(n+1))+(1+2+...+n)=(n+1)^2 or
2*(1+2+...+n)+n+1=(n+1)^2 or
2*(1+2+...+n)=n*(n+1) or

Anyway, great idea and keep doing things that interesting

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