Featured clue | 10- and 16-across: “a² + b² = c² and the like”
Factoid | 4-down: “The name ‘Warheads’ comes from the notion that the sour taste of the candies is akin to a real warhead going off in one’s mouth, and the brand’s mascot, Wally Warheads, is depicted as a boy with puckered lips and a small mushroom cloud emanating from the top of his head.”