Net of a cone
Traced by <a href="//commons.wikimedia.org/wiki/User:Stannered" title="User:Stannered">User:Stannered</a>
2007-03-06
<a href="//commons.wikimedia.org/wiki/File:KegelNetz.png" title="File:KegelNetz.png">Image:KegelNetz.png</a>