Parallel and Perpendicular Warm-up

Front

What is the slope of a line perpendicular to a line with slope 5?

Back

The slope of a line perpendicular to a line with slope 5 is -1/5.

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Back

Front

If two lines have the same slope, what can we say about their relationship?

Back

If two lines have the same slope, they are parallel.

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Back

Front

What is the relationship between the slopes of two perpendicular lines?

Back

The slopes of two perpendicular lines are negative reciprocals of each other.

Front

Back

Front

What can we conclude if two lines have slopes of 2 and -1/2?

Back

The lines are perpendicular because their slopes are negative reciprocals.

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Back

Any slope that is not -6 is neither parallel nor perpendicular.

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Back

Front

Back