@benleis ok I got started but not sure if I've found all solutions (I graphed to check and there seems to be more than I have)
#HintChat
I'm putting content warning on next post in case others don't want to see my thoughts.

Joli problème
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RT @MathforLove
Challenge: prove that the blue path and the red path have equal lengths.

No spoilers, please!

Instead, share thoughts on useful hints to help students with this problem.
#hintchat

Huge thanks and hat tip to @DavidKButlerUoA for this problem!
#iteachmath #mtbos
https://twitter.com/MathforLove/status/1645501442189561858

@DavidKButler And is it your problem/observation as well? Really lovely.

I'll post it as a #hintchat (which I've been doing lately) on twi. I'll make sure to give you a hat tip for the problem 🙂