Fawn Nguyen is so great at sharing interesting math problems. On twitter, on her blog, in person, and probably some bat signal type thing if you live in California – she’s got such a great nose for interesting math. By super happy coincidence earlier in the week we were working through oddly similar problems. I wrote about it here:

When My Evening was Similar to Fawn Nguyen’s Evening

This morning I finally got around to doing a quick version of the problem Fawn shared with my kids.

The problem is this: how do you find the volume of a Rhombic Dodecahedron, or as she put it on Twitter:

Here’s the start, just showing what the shape looks like:

Up next is this fun observation from Fawn:

The final step is figuring out the volume of all of those pyramids – you **must must must** need a formula, after all, this is math we are talking about, right 🙂

I wish I’d been filming the construction of the pyramids inside of the cube, because my younger son’s face when he realized that the 6 pyramids filled the cube was priceless.

A super fun project that actually can be modified to fill a long time or shorter time. Really thankful that Fawn shared this one