Getting Around with Perimeter…
Perimeter means the distance around something- like the fence around a garden to keep the deer from pilfering your plants. Or, the boards around a sandbox that keep the sand from…
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.…