Q: Do Two planes always intersect in a line?

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In geometry, two planes intersect in a line. The only time this is not true is if the two planes are parallel to each other.

Two planes that intersect are simply called a plane to plane intersection. When they intersect, the intersection point is simply called a line.

Yes. If two planes are not coincident (the same plane) and are not parallel, then they intersect in one straight line.

If the lines are in the same plane and never intersect they are always parallel. Two line can not intersect and be parallel if they are in different planes though. Take a cube for example, if you have one Sid of it and take the edge and then go to the opposite side and make a horizontal line they will never intersect but are also not parallel.

Yes, a transversal line always intersects two parallel lines.

Related questions

No. Two planes may be parallel and so may not intersect. Also, any line is the intersection of infinitely many planes, not just two.

Two planes intersect at a line

The intersection of two planes is one straight line.

A line. When two planes intersect, their intersection is a line.

Two planes intersect at a line. The line where they intersect pertains to both planes. In the same manner, if infinitely many planes intersect each other at the same line, then that line pertains to the infinitely many planes.

In 3d space, two planes will always intersect at a line...unless of course they are the same plane (they coincide). Because planes are infinite in both directions, there is no end point (as in a ray or segment). So, your answer is neither, planes intersect at a line.

Yes. If two planes are not coincident (the same plane) and are not parallel, then they intersect in one straight line.

Two distinct planes will intersect in one straight line.

The intersection of two planes is a line.

In geometry, two planes intersect in a line. The only time this is not true is if the two planes are parallel to each other.

Yes, the intersection of 2 planes is a line.

A line