sketch used to clarify determination of <a href="//commons.wikimedia.org/w/index.php?title=Intantaneous_centre&amp;action=edit&amp;redlink=1" class="new" title="Intantaneous centre (page does not exist)">intantaneous centres</a> of rotation, <i>P</i>, <i>P<sub>1</sub></i>, and <i>P<sub>2</sub></i>; also represented are three points <i>A</i>, <i>B</i>, and <i>C</i>, and the associated velocity vectors <b>V<sub>A</sub></b>, <b>V<sub>B</sub></b>, and <b>V<sub>C</sub></b>.
<a href="//commons.wikimedia.org/wiki/User:VanBuren" title="User:VanBuren">VanBuren</a>
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<span class="int-own-work" lang="en">Own work</span>