Perpendicular lines are lines that intersect to form a right angle.

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•  There would be a consequence because it isn't the solution to the problem and it isn't the right answeraccording to the perpendicular postulate.
• The way to find the slope of perpendicular lines is to find the first and second slopes of the equations. Then divide them into each other. Finally, the answer should equal -1.

To learn moe about perpendicular lines, 

watch the clip to the right.