Angle Between 2 Planes - How to find it ?!

We learn how to find the angle between 2 planes with a worked example. We use the fact that the angle between two planes is equal to the angle between their normals. Using the planes' cartesian equations, that are given, we define the normals and then use the dot product formula for the angle between two planes to find the angle. The method is clearly explained as we work through the example.