complete explanation for volume of a pyramid here: pythagoreanmath.com/deriving-the-volume-of-a-pyramid/ Sum of integers squared video link: www.youtube.com/watch?v=229csazhybg Buy my app! itunes.apple.com/us/app/euclids-elements-book-1/id717831746?ls=1&mt=8 Animated proof that volume of a pyramid is equal to Bh/3.