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The slope of parallel lines are the same, but the slope of perpendicular lines are negative reciprocals of each other.

Q: Do parallel lines have negative reciprocals?

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If you have two lines that have negative recipricals (1 and -1 for example), the lines are perpendicular.

Negative reciprocals of one another.

Two numbers are negative reciprocals if their product is -1. The numbers 1/2 and -2 are negative reciprocals. Their product is -1. This is often seen in problems involving the slopes of two lines. The slopes of perpendicular lines are negative reciprocals. Their product is -1.

one slope is the negative reciprocal of the other

It took me forever to find this answer, but the answer is "Reciprocals" Good Luck!

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negative reciprocal slopes ---> the lines are perpendicular equal slopes ---> the lines are parallel

If the lines are perpendicular, their slopes are negative reciprocals.If the lines are perpendicular, their slopes are negative reciprocals.If the lines are perpendicular, their slopes are negative reciprocals.If the lines are perpendicular, their slopes are negative reciprocals.

Horizontal lines have a slope of zero, and the slope of vertical lines is undefined. Parallel lines have equal slopes, and perpendicular lines have slopes that are negative reciprocals of each other. So we can say that: Two nonvertical lines are parallel if and only if they have the same slope. Two lines are perpendicular if and only if their slopes are negative reciprocals of each other. That is, if the slopes are m1 and m2, then: m1 = - 1/m2 or (m1)(m2) = -1

If you have two lines that have negative recipricals (1 and -1 for example), the lines are perpendicular.

negative reciprocals of each other

Negative reciprocals of one another.

Two numbers are negative reciprocals if their product is -1. The numbers 1/2 and -2 are negative reciprocals. Their product is -1. This is often seen in problems involving the slopes of two lines. The slopes of perpendicular lines are negative reciprocals. Their product is -1.

true (APEX)

true (APEX)

one slope is the negative reciprocal of the other

of mutually perpendicular lines.

Those lines are perpendicular.Those lines are perpendicular.Those lines are perpendicular.Those lines are perpendicular.