document.write( "Question 699964: Prove that the altitudes of an acute triangle are concurrent \n" ); document.write( "
Algebra.Com's Answer #431605 by lynnlo(4176)\"\" \"About 
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THE PROOF IS WHEN 2 OR MORE LINES SEGMENTS WITHIN ANY TRIANGLE INTERSECT AT THE SAME POINT
\n" ); document.write( " DRAW A TRIANGLE ,LABEL B AT TOP OF TRIANGLE
\n" ); document.write( " LABEL A BOTTOM LEFT CORNER
\n" ); document.write( " LABEL C BOTTOM RIGHT CORNER
\n" ); document.write( "THEN DRAW LINES THAT INTERSECT WITHIN THE TRAINGLE AND YOU WILL
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