document.write( "Question 746972: Perpendicular lines intersect to form right angles.\r
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\n" ); document.write( "\n" ); document.write( "always
\n" ); document.write( "sometimes
\n" ); document.write( "never
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Algebra.Com's Answer #454622 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
This is always true by definition. \n" ); document.write( "
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