Public domain photos

The image shows a page from a book with a drawing of a triangle and a right triangle, along with some text and numbers. The text reads "Patent of the Pythagorean Theorem" and the numbers appear to be related to the theorem.

The image shows a page from a book with a drawing of a triangle and a right triangle, along with some text and numbers. The text reads "Patent of the Pythagorean Theorem" and the numbers appear to be related to the theorem.Open in library