This is a shot reverse shot which is where two people are facing away from each other and one turns around to face the other person and then the second person turns around to face the first person who is already looking at the second person.


This is the 180 degree rule which is where two people are facing each other and standing right in front of each other. Then there is an invisible line between both of the characters used. From that and arc is drawn again invisible and this is a 180 degree and this is where the camera is place and the camera can be placed any where on the arc. It is said if the camera goes onto the other side than the characters will change sides and it wont work as well.