# Angle between planes

The angle between the planes is the angle between the perpendiculars to their intersection line drawn in these planes. It is worth noting that the intersecting planes form two angles. The other angle can be found as follows: φ’=180-φ. To calculate the angle between the planes, enter the elements of the equation of the planes into the cells and click on the “Calculate” button.

**The angle between the planes through the equation of the plane**

**Enter the equations of the planes:**

**x +**

**y +**

**z +**

**= 0**

**и**

**x +**

**y +**

**z +**

**= 0**