This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Byrne's Euclid page image . en Image from page of Oliver Byrne's edition of Euclid's elements math ubc ca html Oliver Byrne Euclid other versions PDold Byrne's Euclid Uploaded with
Page 2023 Free-images.com. All images are Public Domain