Calvin and Hobbes by Bill Watterson for September 10, 1990
Calvin: Help me with this homework, ok? What's 6 + 3? Hobbes: 6 +3, eh? Well, this one is a bit tricky. First we call the answer "Y", as in "Y do we care?" Now Y may be a square number, so we'll draw a square and make this side 6 and that side 3. Then we'll measure the diagonal. Calvin: I don't remember the teacher explaining it like this. Hobbes: She probably doesn't know higher math. When you deal with high numbers, you need higher math. Calvin: But this diagonal is just a little under two. Hobbes: Ok. Here, I'll draw a bigger square.