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How do we show that two lines are parallel when using slope? How do we show they are perpendicular when using slope?

User Theo Itzaris
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Answer:

QUESTION:

How do we show that two lines are parallel when using slope? How do we show they are perpendicular when using slope?

ANSWER:

How to determine if a line is a parallel perpendicular or neither?

The slopes of parallel lines are equal, and the slopes of perpendicular lines are opposite reciprocals. This is a worked example of determining whether given lines are parallel or perpendicular.

Explanation:

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User Thunderbird
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