## Plane

### A flat surface made up of points and extends indefinitely in all directions

A plane is a two-dimensional flat surface that extends infinitely in all directions. In geometry, a plane is often represented by a flat piece of paper or a chalkboard. A plane has no thickness and no edges. An important property of planes is that any two points on a plane can be connected by a straight line that lies entirely on the plane. This is known as the planar property.

Planes are used in various fields of science and engineering, including mathematics, physics, and aviation. In aviation, planes are used to describe the motion and trajectory of an aircraft. A plane is used to measure the angle of ascent or descent of a flight, the speed of the aircraft, and the altitude of the plane above the ground.

In mathematics, planes are used to study geometric shapes and patterns. They are used in trigonometry to calculate angles and distances. In geometry, planes are used to study properties of shapes such as symmetry, congruence, and similarity.

In summary, a plane is a two-dimensional flat surface that extends infinitely in all directions and is used to represent shapes, calculate angles and distances, and study patterns and properties in various fields of science and engineering.

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