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.
Pi eq over d.svg Information Vector version of Image Pi eq over from the English Own Kjoonlee based on previous work by User Papeschr Pi ImageNote pie diameter circumfrence ImageNoteEnd
Page 2023 Free-images.com. All images are Public Domain