ارسال شده از lh5.googleusercontent.com
![رادیان](https://lh5.googleusercontent.com/-dJsRfi7_Crw/Utl_miUi3II/AAAAAAAA8jM/2ODyIK015WI/s450-no/How+radians+work.gif).
![رادیان](https://lh5.googleusercontent.com/-dJsRfi7_Crw/Utl_miUi3II/AAAAAAAA8jM/2ODyIK015WI/s450-no/How+radians+work.gif).