Hi,

a) This is a generic illustration that can be reproduced easily (PowerPoint would do the job). Just give a look on the illustration- it is easy to reproduce and appears in every textbook about geometry. I don't think it needs a license.

b) I need it in order to add a section in https://en.wikipedia.org/wiki/Atan2.

Daniel

Your request at Files for upload

edit

  Hello, and thank you for your request at Files for upload! Unfortunately, your request has been declined. The reason is shown on the main FFU page. The request will be archived shortly; if you cannot find it on that page, it will probably be at this month's archive. Regards, Nick⁠—⁠Contact/Contribs 16:58, 23 October 2015 (UTC)Reply