document.write( "Question 484244: prove that sum of three interior angle is 180 degree
\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #331342 by richard1234(7193)![]() ![]() You can put this solution on YOUR website! Draw a line through a vertex that is parallel to the side opposite that vertex. Use what you know about parallel lines and angles to prove it. \n" ); document.write( " |