>>16774245
It's from this book by Lewis Carroll/Charles Dodgson, who also wrote Alice in Wonderland.

https://archive.org/details/euclidbooksiii00euclrich

https://old.maa.org/press/periodicals/convergence/mathematical-treasure-dodgsons-euclid-books-i-and-ii

Same author as this book.

>>16774235

Picrel is higher resolution.