document.write( "Question 585120: find the measures of an interior angle and an exterior angle of a regular triangle \n" ); document.write( "
Algebra.Com's Answer #373137 by Alan3354(69443)\"\" \"About 
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find the measures of an interior angle and an exterior angle of a regular triangle
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\n" ); document.write( "\"regular\" means all sides and all angles of a polygon are equal.
\n" ); document.write( "sides to sides, angles to angles.
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\n" ); document.write( "The sum of the angles of a triange is 180 degs
\n" ); document.write( "3*angle = 180, so
\n" ); document.write( "each interior angle = 60 degs
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\n" ); document.write( "Ext = 180 - Int = 120 degs
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