When two perpendicular lines cross, a right angle is formed.
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Not only that; to be "perpendicular", they have to cross at an angle of 90 degrees.
An angle is formed when two lines meet (or cross). The vertex is the point where the lines meet.An angle is formed when two lines meet (or cross). The vertex is the point where the lines meet.An angle is formed when two lines meet (or cross). The vertex is the point where the lines meet.An angle is formed when two lines meet (or cross). The vertex is the point where the lines meet.
If the angle formed between the intersecting lines are 90o then the two lines are perpendicular. In 2D coordinate geometry, a perpendicular line has a slope equal to the negative reciprocal of the original line.
Railroad tracks or the number 11 are parallel lines. A cross or a small t are perpendicular lines. Also the two ll's in the middle of parallel are parallel lines.
Perpendicular lines are any two lines that intersect at a 90 degree angle.