Coplanar
Points, lines, or segments that lie on the same plane
Coplanar is a term used in geometry and refers to a set of points or objects that all lie in the same plane. A plane is a flat, two-dimensional surface that extends infinitely in all directions. Therefore, any set of three or more coplanar points can be fit on a single plane.
In practical terms, coplanar is often used to describe figures or objects in a two-dimensional space, such as a triangle, quadrilateral or circle, that all lie within the same plane. It can also refer to the relative positioning of objects in a three-dimensional space that appear to share the same flat surface when viewed from a particular angle or perspective.
For example, if you have three points A, B and C on a piece of paper, and you can fit a flat piece of cardboard over them such that all three points lie on the cardboard, then they are said to be coplanar. Another example of coplanar objects can be a rectangle and a square placed on the same plane.
Understanding coplanarity is important in many areas of math, science, engineering and architecture, as it can help in analyzing and modeling problems that involve figures in a two-dimensional space.
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