Parallel and perpendicular lines, Mathematics

The last topic that we have to discuss in this section is that of parallel & perpendicular lines. Following is a sketch of parallel and perpendicular lines.

1298_Parallel and perpendicular lines.png

Suppose that the slope of Line 1 is m1 and the slope of Line 2 is m2.  We can relate the slopes of parallel lines & we can relate slopes of perpendicular lines as.

parallel : m1 = m2

perpendicular : m1m2  = -1  or m2= -1/m1

Note down that for perpendicular lines there are two forms of the equation. The second is the morecommon & in this case usually we say that m2 is the negative reciprocal of m1.

Posted Date: 4/6/2013 6:02:58 AM | Location : United States







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