document.write( "Question 256574: how do you find the measurements of the angles in a 20-gon? My daughter's math book is very unspecific \n" ); document.write( "
Algebra.Com's Answer #188744 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! we parents have to stick together...\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "for ANY regular polygon:\r \n" ); document.write( "\n" ); document.write( "___ the sum of the EXTERIOR angles is 360º\r \n" ); document.write( "\n" ); document.write( "___ interior and exterior angles are supplementary (add to 180º)\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "in this case,\r \n" ); document.write( "\n" ); document.write( "___ there are 20 exterior angles, so each one is 18º (360 / 20)\r \n" ); document.write( "\n" ); document.write( "___ the interior angles are supplements of 18º, so each one is 162º (180 - 18) \n" ); document.write( " |