document.write( "Question 136812: Will someone PLEASE help me with this. I asked earlier. Thank you\r
\n" ); document.write( "\n" ); document.write( "I need a 50 word response to this question: How can you determine if two lines are perpendicular?\r
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Algebra.Com's Answer #100126 by solver91311(24713)\"\" \"About 
You can put this solution on YOUR website!
Given \"L%5B1%5D\": \"y=m%5B1%5Dx%2Bb%5B1%5D\" and \"L%5B2%5D\": \"y=m%5B2%5Dx%2Bb%5B2%5D\", \"L%5B1%5D\" is perpendicular to \"L%5B2%5D\" if and only if \"m%5B1%5D=-1%2Fm%5B2%5D\", which is to say that the slopes are the negative reciprocal of each other.\r
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\n" ); document.write( "\n" ); document.write( "Given the angle measure between two intersecting lines: The two lines are perpendicular if and only if the angle measure is either 90 degrees or \"pi%2F2\" radians.\r
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\n" ); document.write( "\n" ); document.write( "That's 57 words, give or take.
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