how do i find all the interior angles of a concave polygon? here is a java applet that does the same :-

http://www.mathopenref.com/polygoninteriorangles.html

thanks

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Interestingly if you had bothered to read the text of that page below the Java applet it tells you exactly how you can calculate the interior angle for a regular polygon and further it links boldly at the top of the page to a page about exterior angles too. Read More

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