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.
Keywords from Image Description:
Arclength.svg Curve and polygonal paths The arclength is the smallest number that the lengths of such polygonal paths can never exceed en Dariusofthedark en Dariusofthedark original upload log page en Arclength svg Dariusofthedark bytes no Move to Commons Summary Curve and polygonal paths The arclength is the smallest number