Different boolean operations on two shapes.
<a href="//commons.wikimedia.org/wiki/User:%D0%94.%D0%98%D0%BB%D1%8C%D0%B8%D0%BD" title="User:Д.Ильин">Д.Ильин</a>: vectorization
<a href="//commons.wikimedia.org/wiki/File:Boolean_operations_on_shapes.png" title="File:Boolean operations on shapes.png">File:Boolean operations on shapes.png</a> by <a href="//commons.wikimedia.org/w/index.php?title=User:TowerOfBricks&amp;action=edit&amp;redlink=1" class="new" title="User:TowerOfBricks (page does not exist)">TowerOfBricks</a>