In general, none.
Rays aren't really lines, since (Euclidean) lines extend infinitely in all directions, so they can't be parallel lines. But that's to fret a bit too much over the wording. Yes, rays, just like lines and line segments, can be parallel to other rays, lines, or line segments.
For two linear equations, they are equations representing parallel lines. (The lines must not be concurrent because if they are, you will have an infinite number of solutions.) For example y = mx + b and y = mx + c where b and c are different numbers are two non-concurrent parallel lines. The equations have no solution. With more than two linear equations there is much more scope. Unless ALL the lines meet at one point, the system will not have a solution. So a system consisting of equations defining the three lines of a triangle, for example, will not have a solution.
Five types of lines are: Horizontal - A line that runs from left to right in a straight line vertical - A line that runs from top to bottom in a straight line Perpendicular - When two straight lines intersect (i.e.cross) each other at right angles (= 90°) Parallel - When two lines never meet each other, no matter how much you extend them Intersecting - When two or more lines meet or cross
A pentagon can have none, one or two pairs of parallel sides.
In general, none.
Rays aren't really lines, since (Euclidean) lines extend infinitely in all directions, so they can't be parallel lines. But that's to fret a bit too much over the wording. Yes, rays, just like lines and line segments, can be parallel to other rays, lines, or line segments.
Pretty much the only thing you need to know to determine if two lines are parallel is the gradient of those lines. Simply put, are the lines on the same plane?
Yes, parallel lines have the same slope. Parallel means that the lines go on forever and never cross - so, you could practically put one line on top of the other and it would have the same slope (how much it rises in relation to how far over it goes). The only difference between two lines that are parallel is their y-intercept (where they cross the y-axis).
Yes, that's pretty much the definition of parallel.
It can, but a parallel loadable shift register is a more efficient way to do it and is much more common.
This one is much more straightforward. There are 5C2 = 10 ways to choose two parallel lines from the set of five. There are 4C2 = 6 ways to choose two parallelograms from a set of four. Any parallelogram is uniquely determined by one pair of lines from the five, and one pair of lines from the four. Thus, the number of possible parallelograms is(5C2)*(4C2) = (10)*(6) = 60
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Latitude lines run parallel to the Equator while longitudinal lines (also called meridians) run north-south. The latitude angle ranges from 0 degrees at the Equator to 90 degrees at either the north or south pole.
1 they are all on the same parallel 2 they will have relatively the same average temps 3 the rainfall does not differ much
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On a flat surface, in plane geometry, two parallel lines never meet; they are perfectly aligned with each other, so that they neither approach nor diverge from each other, at any distance. Parallel lines can meet at the poles, but not in plane geometry; this happens in spherical geometry. If the lines are on a sphere, such as, for example, the lines of longitude that are used (in conjunction with lines of latitude) to specify locations on the planet Earth, parallel lines meet at the poles. On a large scale, these parallel lines look completely different from those of plane geometry, but on a small scale, these huge circles will look much like line segments of plane geometry. Over short distances, the spherical surface of the Earth appears to be flat.