Tomorrow I'm giving a maths talk to a load of 15/16 year olds. It's a talk I last gave in 2014, so I've updated it a bit.
I've put my slides online at https://www.staff.ncl.ac.uk/christian.perfect/an-enneahedron-for-herschel-2021/
What do you think? (Obviously you don't know what I'll say about them!)
weirdly, the custom element code I copied from MDN didn't work in Chrome, for <undisclosed reasons>. I've found a way of making it work now
For comparison, here are the slides I used in 2014: https://www.staff.ncl.ac.uk/christian.perfect/outreach-enneahedron-slides/