No they are perpendicular if the intersect at a right angle.
+ is perpendicular, = is parallel
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a transversal line If a transversal intersects two parallel lines, then the alternate interior angles are congruent.
A transversal.
It is a transversal line
Yes, it does. And it makes equal angles with both of them.(We're talking about straight lines, in a plane.)
two ways : 1. calculate the slope of the two lines, if it is same, they are parallel. 2. draw a perpendicular line ( 90 degrees) from on of the lines and if it intersects the other line at 90degrees then they are parallel -HD