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No. Only lines that intersect at 90 degree angles are perpendicular. Any other lines that cross each other are simply intersecting lines.

Q: Is it true that two lines with different slopes are perpendicular?

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Perpendicular lines have slopes whose product is -1. As this is always true, if we think of .33 as about 1/3, then the perpendicular line would have a slope of -1/(1/3) which is -3.

The slopes are negative reciprocals.

No, that is not true.

true

yes

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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.

true (APEX)

true (APEX)

The slopes of two perpendicular lines are negative inverses of each other. In other words, the two slopes when multiplied together equal -1.

No, the slope will be -1

In that case, the product of the slopes is equal to minus 1.

Not for the usual definition of the word "opposite." The perpendicular of a line having a slope of 2 has a slope of -0.5.

Perpendicular lines have slopes whose product is -1. As this is always true, if we think of .33 as about 1/3, then the perpendicular line would have a slope of -1/(1/3) which is -3.

Parallel lines are never perpendicular. Perpendicular lines are co-planar and cross at right angles.

What is a 'Straight Angle'???? Perpendicular lines meet at 90 degrees ( right- angles).

The slopes are negative reciprocals.

true