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if they are parallel they run side by side forever and will never cross. if they are perpendicular they will cross at a 90 degree angle.

You can also tell just by looking at the equations for the lines if they are in the slope-intercept form (y = mx + b, where m is the slope and b is the y-intercept). When two lines are parallel, they have the same slope. When two lines are perpendicular, the slope of one is the negative reciprocal of the slope of other. For example, a line with a slope of 2 is perpendicular to a line with a slope of -½, and a line with a slope of 1 is perpendicular to a line with a slope of -1. (y = 1 and x = 1 are perpendicular because the slope of y = 1 is zero, the slope of x = 1 is infinity, the reciprocal of infinity is zero, and negative zero equals zero.)

Q: How do you know if two graphed lines are parallel or perpendicular?

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As far as we know, two lines can be perpendicular, or they can be parallel, but they can't be both.

perpendicular cross parallel do not

Please read both answers in case that's what you know because there are two names.a set of lines that are not parallel or perpendicular are called normal lines because no one has thought of a name but one young man in 2000 also came up with the word PARAPENDICEL. {para - pen - dic - eel} he came from a place called abbey mead in Gloucestershire.a set of lines that are not parallel or perpendicular arecalled anomeus lines.

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When the lines intersect at a 90ΒΊ angle

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As far as we know, two lines can be perpendicular, or they can be parallel, but they can't be both.

10, A decagon has a maximum of five pairs of perpendicular lines, and a maximum of 5 parallel lines. however, this isn't in black and white it can have no pairs of line either perpendicular or parallel. know write the answer clearly

The only requirement for a trapezoid is that one pair of opposite sides be parallel. There could be trapezoids with a pair of perpendicular lines.

perpendicular cross parallel do not

Please read both answers in case that's what you know because there are two names.a set of lines that are not parallel or perpendicular are called normal lines because no one has thought of a name but one young man in 2000 also came up with the word PARAPENDICEL. {para - pen - dic - eel} he came from a place called abbey mead in Gloucestershire.a set of lines that are not parallel or perpendicular arecalled anomeus lines.

l dnot relly know but it is a

If two lines are parallel, they have the same slope.(And if they are perpendicular, the product of their slopes is minus one - unless one line is horizontal and the other vertical.)

perpendicular lines intersect each other at 90 degrees whereas parallel lines never intersect each other and remain equal distance apart from each other. Obviously the way to test if two lines are parallel is to measure their distance from each other at at least two points (the farther apart the better) to confirm that they remain equal distance apart, but to test if lines are perpendicular, with a compass with the point at the point where the two lines intersect, draw an arc (or three parts of an arc) that intersects one of the lines in two places and the other line in one place. If the distances between the lines at the points where they are intersected by the arc are equal, the lines are perpendicular.

If by two sets of perpendicular lines you mean two pairs of perpendicular lines we can do it. One set of parallel lines is easy so draw that as the first and second lines A right angle from one of them will intersect the other at a right angle so that's the third line and the right angles sorted. The fourth side cannot be parallel to the third so draw it at an angle to the third. We now have two right angles, one set of parallel lines and two pairs of perpendicular lines, first and third, and second and third. What we call it depends on where we are. In the UK it is called a trapezium and in the USA a trapezoid. I'm afraid I don't know naming conventions in other countries.

"perpendicular lines"

Diamonds come in all shapes and sizes, which determine the number of perpendicular lines (assuming you are referring to the edges as the lines) so there is no one number of lines or perpendicular lines on a diamond.

When the lines intersect at a 90ΒΊ angle