Endpoint/Face/Geometric Figure/Geometry/Intersection
ENDPOINT In a line segment, the two points at the end of the segment used to name it.
FACE A plane surface of a space figure.
GEOMETRIC FIGURE Every set of points in space.
GEOMETRY The study of space and figures in space.
INTERSECTION A set that contains all the members common to two other sets no other members. The intersection of the model. Illustration:
The intersection of angles AYD and CYD is “Y.”