Assists in the illustration of how to compute the <a href="https://en.wikipedia.org/wiki/centroid" class="extiw" title="w:centroid">centroid</a> of an object.
<a href="//commons.wikimedia.org/wiki/User:CloakReaver" title="User:CloakReaver">User:CloakReaver</a>
Self-made, but based on <a href="//commons.wikimedia.org/wiki/File:COG_1.png" title="File:COG 1.png">Image:COG 1.png</a>.