Current location - Training Enrollment Network - Mathematics courses - How to prove that the plane is perpendicular to the plane in solid geometry?
How to prove that the plane is perpendicular to the plane in solid geometry?
The first one: to find the normal vectors of two planes by vectors, as long as it is proved that the normal vectors of the two planes are vertical.

Second, it is proved that a straight line in one plane is perpendicular to two intersecting true straight lines in another plane, and similarly, it is proved that a straight line in this plane is perpendicular to two intersecting straight lines in the original plane at the same time.

I suggest the best vector, simple and easy to find!