EN: 180° rule
This is the rule which states that if two people are filmed in a sequence there is an invisible line between them and the camera should only be positioned anywhere within the 180 degrees on one side of the line. Crossing the line results in a certain particular jump, where is appears that the two people suddenly switched places.
The Pollio Folio - Glossary of Cinematography Terms
The 180-degree rule of shooting and editing keeps the camera on one side of the action.
Cel Mai folosit cuvant: -degree | Domeniu Aplicare : Cinematografie | Caractere: 70 Cuvinte: 16 | Limba: Engleza | Sursa Columbia Film School Glossary