In criminology, Mobility triangles are the triangular areas formed by the locations of the victim's home, the offender's home and the crime. They are used to describe spatial patterns of crimes, and to facilitate the classification of crimes based on location. Implicit in the concept is the assumption that the homes of the victim and the offender form anchor points that govern the crime location. Mobility triangles are related to the criminological frameworks of routine activity theory and environmental criminology.