It can, but need not.
It can, but need not.
It can, but need not.
It can, but need not.
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No. Perpendicular lines for right angles. That is why they are called perpendicular.
If the lines are perpendicular, their slopes are negative reciprocals.If the lines are perpendicular, their slopes are negative reciprocals.If the lines are perpendicular, their slopes are negative reciprocals.If the lines are perpendicular, their slopes are negative reciprocals.
perpendicular lines run at 90% angles to each other not Parallel
Non-perpendicular intersecting lines. There is no special name.
Perpendicular: No Parallel: Yes, two pairs.