👉 In geometry, a "contiguity" is defined as a set of points that are all within a line or plane. It can be thought of as a line segment with two endpoints that lie on the same side of it and do not intersect. Contiguity is an essential concept in Euclidean geometry because it allows us to determine if any two lines (or planes) are parallel, intersecting, or coinciding. This property is crucial for understanding how shapes are defined and constructed within a
