Some of number is wrong!!!

The eqaution of plane is wrong!!!

Enter the equations of the planes:

x + y + z + = 0

and

x + y + z + = 0

The number of digits after the decimal separator in numbers:

The angle between planes is:

in radians =

in degrees =

If two planes intersect, they intersect in a straight line. This line divides each into two half-plane.

Figure formed by two half-planes and the line is called **a dihedral angle**. In this straight - this is the edge angle,
the half-plane - it faces the corner.

Dihedral angle is measured by the linear, ie the angle formed by two beams perpendicular to the edge and corner of their respective faces.

The two crossed the plane formed by two pairs of adjacent angles. The smaller of adjacent angles is called **the angle between the planes**.

Let the intersecting planes set by the following equations:

then the angle between the planes is calculated as follows:

**References**

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