Anger is one of our primitive reptile emotions. In almost all cases it is destructive and an emotion to be avoided if possible. This is easier said than done because we are all human beings and share the same frailties.
So how can we deal with another person who is angry? The most important consideration is that if we are also angry this situation is a recipe for disaster. So control your own emotions first, and this video includes a few suggestions that just might help.