They are perpendicular lines
Perpendicular Lines form right angles at their point of intersection
Lines that intersect to form right angles at their point of intersection have slopes that are negative reciprocals.
Perpendicular lines
Perpendicular lines
Perpendicular.
They are perpendicular.
Perpendicular
Perpendicular
perpendicular lines
perpendicular lines! :D
Two perpendicular lines form right angles at their point of intersection.
These are called perpendicular lines.