“Unrolling these circles fills a triangle with base 2 π r and height r (where r is the radius of the filled disk). Such a triangle has area π r². This does not serve as a complete proof for why this is the area of a circle, but can give you some intuition for why it should be. http://pastebin.com/agPAjw6W ”

source: http://blog.matthen.com/post...

source: http://blog.matthen.com/post...

source: http://browncardigan.com/...

ok, I think I've got it now

http://thechive.com/2014...

http://thechive.com/2014...

@tonyb The joke is that there is actually an Eye of Horus behind him.

@tonyb i was laughing like an idiot all the way through that. Thank you, i needed it.