Math question

I have a friend, that saids, that sometimes angles in triangle may not sum up to 180 degrees. He also stated once, that there is a shape, that fit into square with finite area, but length of this shape is infinite. Not to mention, that he laughs hen I say, that x/x is always equal to 1. Is he trolling me or is he just a plain idiot?

>>6
The fact that lim_{x -> 0}f(x) = C does not prove that f(0) = C.

>>6
What the fuck is your point you stupid piece of shit?

>>6
The limit when x approaches 0 of the first term is one, the first term is undefined at x = 0.