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'''Plane geometry''' is a branch of mathematics dealing with geometry on a flat surface, typically called the '''Euclidean Plane'''. Any point on such a plane can be described using just two coordinates, referred to as the "horizontal" and "vertical" components. The point at coordinates (0,0) is called the origin.

'''Plane geometry''' is a branch of mathematics dealing with geometry on a flat surface, typically called the '''Euclidean Plane'''. Any point on such a plane can be described using just two coordinates, referred to as the "horizontal" and "vertical" components. The point at coordinates (0,0) is called the origin.