PARALLEL AND PERPENDICULAR LINES IN A PLANE Flashcards
1
Q
line 1 is parallel to line 2 if
A
their slopes are equal and their y intercepts are not
2
Q
line 1 is perpendicular to line 2 iff
A
m₁=-(1/m₂)
or
m₁ × m₂ = −1
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