document.write( "Question 457166: can you explain to me why the exterior angle of a triangle equals the sum of two interior opposite angles thanks alot \n" ); document.write( "
Algebra.Com's Answer #313663 by Alan3354(69443)\"\" \"About 
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The sum of angles in a triangle = 180 degs
\n" ); document.write( "The sum of any 2 angles = 180 - the 3rd angle
\n" ); document.write( "--------
\n" ); document.write( "The exterior angle also = 180 - the interior angle
\n" ); document.write( "There's no \"why\", it just does
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