What's this about?
Here you can calculate the intersection of a line and a plane (if it exists).
Do a line and a plane always intersect?
No. There are three possibilities: The line could intersect the plane in a point. But the line could also be parallel to the plane. Or the line could completely lie inside the plane.
Can i see some examples?
Of course. This is Mathepower. Simply enter your exercise and it will be solved step by step.