Chalmers: We have reason to believe your son has been dealing drugs. Marge: Dealing drugs? That's impossible, he doesn't have the math skills. Chalmers: Marge, I know you've tried everything to keep Bart under control. Ritalin, Lithium, Zoloft. Well they didn't work, he has moved on to drugs.
Homer: (Wearing glasses) The sum of the square roots of any two sides of an isosceles triangle is equal to the square root of the remaining side! Man: (From inside a bathroom stall.) That's a right triangle, you idiot! Homer: D'oh!