No.
Two planes intersect at a line
The angle between two planes when the planes intersect at a point is the acute angle fixed by the normal vectors of the planes.
No, 2 planes may only intersect at a line, a plane, or not at all. THREE planes may intersect at a point though...
yes two lines intersect to form a point two planes intersect to form a line
When two planes intersect, they do so along a line, which is the locus of points common to both planes. This means they do not intersect at just one point but rather along an entire line. If the two planes are parallel, however, they will not intersect at all. Thus, the statement is incorrect; they intersect in a line, not a single point.
Two planes that intersect are simply called a plane to plane intersection. When they intersect, the intersection point is simply called a line.
No, the two planes intersect at a line, which is an infinite number of points.
Yes. If two planes are not coincident (the same plane) and are not parallel, then they intersect in one straight line.
No, perpendicular planes intercept at only one point. Parallel planes do not intersect at all.
No, two planes do not always intersect at only one point. They can either be parallel and not intersect at all, or they can coincide, meaning they lie on top of each other and share all points. If two planes do intersect, they do so along a line, rather than at a single point.
No, two planes do not always intersect in a single point. They can either be parallel and never intersect, or they can coincide, meaning they are the same plane and thus intersect along an infinite number of points. If they do intersect, the intersection will be a line, not just a single point.
No, they intersect at a line.