document.write( "Question 765694: Why is the sum of the external angles of any polygon=360 \n" ); document.write( "
Algebra.Com's Answer #466332 by MathLover1(20849)\"\" \"About 
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The Exterior Angle is the angle between any side of a shape,
\n" ); document.write( "and a line extended from the next side.\r
\n" ); document.write( "\n" ); document.write( "when you add up the Interior Angle and Exterior Angle you get a straight line, \"180\"°-Supplementary Angles\r
\n" ); document.write( "\n" ); document.write( " it's proven that the sum of a triangle's angles, no matter what, always total 180 degrees. Because all polygons consist of triangles, the (number of sides - 2) multiplied by \"180\" is the total angle measure\r
\n" ); document.write( "\n" ); document.write( "or, the exterior angles add up to one full revolution (which is \"360\"°)
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