point of intersection.
When the line is inclined to the plane. That is, it is not in the plane nor is it parallel to it.
yes
yes
In Euclidean plane geometry two infinitely long straight lines intersect at only one point
point of intersection.
Yes, except when the line is in the plane. In the latter case, they intersect at each point on the line (an infinite number).
When the line is inclined to the plane. That is, it is not in the plane nor is it parallel to it.
yes
yes
No, 2 planes may only intersect at a line, a plane, or not at all. THREE planes may intersect at a point though...
In Euclidean plane geometry two infinitely long straight lines intersect at only one point
Yes. If two planes are not coincident (the same plane) and are not parallel, then they intersect in one straight line.
Theorem: If two lines intersect, then exactly one plane contains both lines. So, when two or more lines intersect at one point, they lie exactly in the same plane. When two or more lines intersect at one point, their point of intersection satisfies all equations of those lines. In other words, the equations of these lines have the same solution, which is the point of intersection.
Lines in a plane can intersect at only one point.
The intersection of three planes can be a plane (if they are coplanar), a line, or a point.
No, two planes do not intersect in exactly one plane unless the planes are exactly overlapping, making one plane. In Euclidean Geometry two planes intersect in exactly one line.