Christopher Smy asked for a geometric proof of the identity $$1^3+\ldots+n^3 = (1+\ldots+n)^2.$$ Because I like that sort of thing, I couldn’t resist drawing a picture:

If you like that sort of thing, check out this video or these lecture notes.

Christopher Smy asked for a geometric proof of the identity $$1^3+\ldots+n^3 = (1+\ldots+n)^2.$$ Because I like that sort of thing, I couldn’t resist drawing a picture:

If you like that sort of thing, check out this video or these lecture notes.