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:
Perpendicular Bisector. en Constructing perpendicular bisector by using compassandstraightedge construction zhtw own ChenPan Liao other versions Basic code file width height pointsize plot bk function My sqrt pause angL ang seq pi length angL cos ang cos angpi sin ang arc seq pi length angL xarc cos arc xarc