*Point *** :** A mathematical point is a fixed location. It cannot be moved.

*Line***:** A line is a collection of points extended endlessly in both the directions. It has no end points.

** Line Segment :** A line segment id part of a line. It has two end points.

** Ray :** A ray is part of a line. It has one end point and goes endlessly on one direction.

** Concurrent Lines :** Lines that pass through the same point are called concurrent lines.

** Collinear Points :** If three or more points lie on a straight line, the points are said to be collinear points.

*Non -Collinear Points***:** Three points not lying in the same straight line are called the non – collinear points.

** Plane :** A plane is a flat surface that goes on endlessly indefinitely in all directions.

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