Q: Why are all horizontal lines parallel?

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The parallel line would also have a slope of zero (both are horizontal lines).

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

Meaningless question. It sounds like a riddle rather than a maths problem. For an answer, assuming it is a riddle, I'd look at the letters that spell NINE. The six parallel lines are the vertical strokes of the letters; the extra five lines are the horizontal and diagonal strokes.

Horizontal lines always have a slope of 0.

A cone does not have any parallel lines

Related questions

other horizontal lines? which would be 180 degrees i guess.

No, horizontal lines are parallel to each other and parallel lines never intersect.

Parallel lines are lines that, if extended, would never intersect with eachother. This means that they are going in the same direction, eg. | |, but not | \. Horizontal means that that are going across, eg. ___________________, not |. An example of a lines that are parallel and horizontal: _____________________________________ _____________________________________

Yes, as long as each line is different.

Lines of latitude are horizontal lines that run parallel to the equator. They measure the distance north or south of the equator in degrees.

They are the horizontal lines on a map.

because they are parallel to the plane of the horizon

Lines of latitude are horizontal and run parallel to the poles

There are 2 horizontal parallel lines in the letter Z

Horizontal markings are markings (such as painted or etched lines) that are horizontal (or parallel to the ground).

A horizontal line goes from left to right and looks like this. Also, all horizontal lines are parallel to each other. ______________________________________________________________________ ______________________________________________________________________

Like this: _______________________________ _______________________________ _______________________________