Triangular Number Know-How…
Triangular Number Know-How What is a triangular number? It is easy to see what a triangular number looks like, but isn’t there some way of figuring them out without drawing…
Triangular Number Cake
Triangular Number Cake What do bowling ball pins, an unbroken set of pool table balls, and a flock of birds have in common? They can all represent triangular numbers, that’s what.…
Little Old Lady Gingerbread Pi
Arithmetica: Here again and feeling hungry (for some math munchies)! So who's in the mood for pi... er, pie, that is? Hey, have you ever been in a pie eating…