Reflection by https://padlet.com/syalden/btnm3iiwcf A mathematical transformation. en-us 2014-02-25 13:21:41 UTC 2014-02-25 14:57:57 UTC hello@padlet.com Reflection syalden https://padlet.com/syalden/btnm3iiwcf/wish/22034770 2014-02-25 13:21:51 UTC https://padlet.com/syalden/btnm3iiwcf/wish/22034770