The point of intersection is the one point that is common to both lines.
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whatto line segments intersect but are not perpendicular
the parallel lines never intersect each other but they both intersect the line they are perpendicular to
Perpendicular line
Yes, perpendicular lines do intersect at a single point. Think of the line representing the x-axis, and the line representing the y-axis. These two lines are perpendicular, and they intersect at the Origin (a single point).
No they are perpendicular if the intersect at a right angle. + is perpendicular, = is parallel