Triangles that are formed through the relationship of three family members are very important in family systems theory and the analysis of genograms. These triangles represent a particular kind of relationship that can have both positve and negative effects on the family as a system. One of the basic principles of family systems theory is that the family system will naturally seek out homeostasis or some type of balance. When instabilty or conflict is present between two family members, a third family member will often be pulled in to stabilize or solidify the family relations in general. In the example shown below, a triangle has formed between Myrna, Lee, and Lauren. The relationships shown are all represented by a double line, which indicates a close but healthy relationship. Thus, the triangle shown is portrayed as a healthy situation lending stability to the family system without any real negative consequences or effects.