No.
In Euclidean geometry, they can only intersect in 0, 1 or infinitely many points. If there are two points of intersection then the whole line lies in the plane.
There are none. Those two curves do not intersect.
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A line is infinite but a line segment has end points and a midpoint
it's impossible if the line is straight but if u can make it zig-zag then you can make them intersect at as many points as you like.
None. In conventional geometry, any intersection of two planes defines a line, which is an infinite number of points. Many planes may intersect along a single line, or any pair of planes may intersect creating a unique line, but however they intersect, the number of shared points is infinite. If the the planes do not intersect (if they are parallel), then they share zero points.
Yes, there are three ways that two different planes can intersect a line: 1) Both planes intersect each other, and their intersection forms the line in the system. This system's solution will be infinite and be the line. 2) Both planes intersect the line at two different points. This system is inconsistent, and there is no solution to this system. However, both planes will still be intersecting the same line, albeit at different locations on the line. 3) Both planes intersect each other, but their intersection does NOT form the line in the system. However, if the line in the system intersects the planes' intersection, then they will all intersect a single point. The solution will be finite and be a single point. There are also 3 ways two different planes WON'T both intersect a line. 1) The two planes and the line are all parallel to each other, and none of them intersect each other. 2) The line is parallel to one plane, but intersects the other plane. 3) The same as #2, but now the line is parallel to the other plane and intersects the one plane.
No, perpendicular planes intercept at only one point. Parallel planes do not intersect at all.
No. Either they do not intersect at all, or they intersect in a straight line or are the same.
No, they can intersect at infinitely many points.
The intersection of two distinct planes is a line. The set of common points in the line lies in both planes.
No, the two planes intersect at a line, which is an infinite number of points.
YES. The intersection of two planes always makes a line. A line is at least two points.
yes, it may be the two plane intersect at one line or the two planes are coincident.
point of concurrency... or point of intersection
Any two lines can only have one point of intersection. Unless they are parallel, in which case they do not intersect at all. If they are the same line, then they intersect at an infinite number of points.
They need not intersect at all, but if they do, it will be along a straight line and so comprise infinitely many points.