A bit of context: Marjorie Rice achieved minor fame for discovering a number of new ways that (irregular) pentagons can tile the plane -- a surprising feat for an amateur mathematician. You can read more about her on here https://www.quantamagazine.org/marjorie-rices-secret-pentago... and more about pentagonal tessellations here https://en.wikipedia.org/wiki/Pentagonal_tiling, along with a history for when the different tessellations were discovered over the past century or so.
Personally, I love this webpage partially because it's just so different than what I'm used to for the pages of mathematicians. It really comes across as made by someone who was extremely talented at math but who only saw it only as a pastime and never bothered to integrate into the mathematical community.