POINT: A point is an exact location in space. One of the examples that can be represented by a point is a location of the city, on a map.
LINE: A line can be thought of as a connected set of infinitely many points. Using the map example, a line can be the distance between two cities in the map.
PLANE: A plane may be considered as infinite set of points forming a connected flat surface. The map itself can be considered a plane with cities and location representing points.