A video in Swedish describing how to calculate the <a href="https://en.wikipedia.org/wiki/circumference" class="extiw" title="w:circumference">circumference</a> and <a href="https://en.wikipedia.org/wiki/area" class="extiw" title="w:area">area</a> of a <a href="https://en.wikipedia.org/wiki/circular_sector" class="extiw" title="w:circular sector">circular sector</a>.
<a rel="nofollow" class="external text" href="https://www.youtube.com/user/mattevv">Matematik Västervång</a>.
CC BY 3.0
<a rel="nofollow" class="external text" href="https://www.youtube.com/watch?v=uHhXHygSFyY">Omkrets &amp; Area cirkelsektor</a>.