How To Find Angle Between Two Planes in Less Then 5 Minutes!

How To Find the Angle between the Planes; a quick and easy tutorial. 00:15 A #Geogebra visualisations of the #anglebetweentwoplanes. 00:38 The concept behind the method for finding the #angle between to planes. 00:59 What are the #normalvectors to the #plane ? 01:52 How to use #dotproduct to find the angle between the two planes?