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:
Construction of central lines.svg Image showing the construction of the central line associated with the triangle center Krishnachandranvn talk created this work entirely by myself June UTC Krishnachandranvn talk Krishnachandranvn en Cczero Original upload log en Constructionofcentrallines svg bytes Krishnachandranvn