Question

Two planes intersect in a line ______.

always
sometimes
never

Answer 1

Two planes intersect in a line sometimes.

Answer 2

Two planes intersect in a line sometimes.

Explanation:

Two planes intersect in a line ______.

When two lines crosses each other then the lines intersects at one point.

When two lines are parallel to each other then both lies never intersects.

When two lines are not parallel to each other then they will intersect one point. When two lines passes in same direction one above the other then both intersects at many points.

Hence , Two planes intersect in a line sometimes.