document.write( "Question 1158275: Work out the size of an exterior and an interior angle of a regular 18-sided polygon.\r
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Algebra.Com's Answer #781188 by Alan3354(69443)\"\" \"About 
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Work out the size of an exterior and an interior angle of a regular 18-sided polygon.
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\n" ); document.write( "Find the Ext angles first:
\n" ); document.write( "360/18 = 20 degs
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\n" ); document.write( "Int = 180 - 20 = 160 degs
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