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WORKBOOK
PARALLEL AND PERPENDICULAR LINES
1) Two lines are parallel if and only if they have the same slope.
// d d m m tan
1 2 1 2
2) Two lines are perpendicular if their slopes are negative reciprocals.
d d m m 1
1 2 1 2
Ex: Write the equation of the line passing through the point P and parallel to If P(1,2) and :
3x-y =4
Ex: Write the equation of the line passing through the point P and perpendicular to If
P(0,2) and : x-3y =1
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102math-wb-w3-(Vector)
