Define the 180* rule.  Embed an image to visually explain the definition. 


The 180* rule is a cinematography guideline that states that two characters in a scene should maintain the same left or right relationship to one another. When the camera passes over the invisible axis connecting the two subjects, it is called crossing the line and the shot becomes a reverse angle. It also states a rule that a camera should be placed somewhere inside 180 degrees on a particular side of the invisible line of a shot containing two people filmed in sequence.