The angle between the planes online calculator

Online calculator which will help you to find the angle between the planes.
Two planes can be parallel to each other or overlap, and if these two planes are parallel then the angle between them is zero.
At the intersection of two planes to form four corners, and if these angles are the same and equal to 90 degrees, this means that planes perpendicular to each other, otherwise you end up with two acute and two obtuse angles.

Specify the equations of the planes:
x + y + z + = 0
x + y + z + = 0

The angle between the planes
radians =
degrees =