Question

The intersection of two planes can be a point. Please choose 1-
Always?
Sometimes?
Never?

Answer 1

Two planes can be parallel: no intersection at all.
If two planes intersect, it's a line.
Planes a & b intersect at line m in the figure.

Answer 2

So is the answer never, sometimes, or always?

Answer 3

If you tried to manipulate planes a and b, could you cause them to intersect at only a point?

Answer 4

You know the answer isn't "always," because you just saw an example where it wasn't a point.

Answer 5

I see so would it be never?

Answer 6

It has to be, yes.

Answer 7

Thank you for the help guys!