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# What are coplanar points?

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Coplanar points are points that lie on the same geometric plane. By definition, three points define a plane, and for any three points, a plane exists that all three points lie on. Since a plane is infinite, the number of possible coplanar points for any plane is also infinite.

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A plane is a two-dimensional surface, and any shape, such a polygon, a curve or a straight line, that can be drawn in two dimensions is made up of coplanar points. Points can lie in more than one plane at a time if those planes intersect. If two distinct planes do intersect, they intersect along a single straight line.

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## Related Questions

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Non-coplanar points are any group of points that do not lie along the same geometrical plane. Points are considered coplanar if they lie along the same plane, and are often used to name that plane (e.g. plane ABCD). If a point E does not lie on plane ABCD, point E is non-coplanar with the other points. Points A, B, C and D are coplanar.

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The segment addition postulate states that if a line segment has three points, then this line segment may be considered two line segments. An example is a line featuring points A, B and C with A and C being the endpoints. In this example, AC = AB + BC.

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A calibration curve is a mathematical tool used in analytical chemistry that provides a set of reference points that unknown chemical substances can be compared to. When analyzing certain substances, scientists are often unable to get a completely accurate understanding of the substance's makeup. With a calibration curve, chemists can compare known information about unknown substances to make estimates about its makeup and chemical properties