**A geometric plane can be named with a single letter, such as plane Q, written in upper case and cursive lettering.** A plane can also be given a name by identifying three distinct spots on it that do not make a straight line.

In geometry, a plane is a flat surface that extends endlessly in all directions and has no thickness. Because of these dimensions, it has no resemblance to any real surface or object. It’s like if a sheet of paper, a whiteboard, or a tabletop could expand indefinitely in all directions. Geometric planes are a helpful geometric tool, even if they have no real-world applications.

A geometric plane is the third step in a mathematical progression that starts with a point and finishes with a solid object. On a plane, a point with zero dimensions is placed. A one-dimensional line, defined by two independent points on a plane, is the second in the sequence. A plane, which is the third in the series and has two dimensions, may hold any number of points and lines. The series concludes with a solid that exists in three dimensions.

A plane can be defined by any three points that do not exist on the same line, similar to how a line is defined by two different points. Plane ABC is an example of this, because points A, B, and C are all on the plane yet do not form a single line.

Parallel planes are two indefinitely extending planes that are the same distance apart at all points. This implies that they never cross. Perpendicular planes are planes with two lines that intersect at a 90-degree angle. Two perpendicular planes are either parallel or intersect at a location when they are perpendicular to a third plane.

A coordinate plane has two axes: an x-axis and a y-axis. These two axes are used to show where points on the coordinate plane are located. On a coordinate plane, the x and y axes are both numbered, with values on the x-axis moving in a positive way from left to right and values on the y-axis moving in a positive manner from zero. On a coordinate plane, the x- and y-axes are perpendicular, and the origin is the point where they intersect at zero.

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