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:
Triangleinscribedcircle.svg en Triangle with inscribed circle The bisectors are shown as dashed lines de Dreieck mit Inkreis Die Winkelhalbierenden wurden gestrichelt eingezeichnet own MartinThoma ValidSVG Source is available at github Images by Martin Thoma TikZ diagrams Incircles of triangles Cczero