point of intersection.
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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.
When the line is inclined to the plane. That is, it is not in the plane nor is it parallel to it.
Tangent
always. if two lines intersect, then exactly one plane contains the lines.
yes