Points, Lines and Planes

Point an entity that has a location in space or on a plane, but has no extent The notion of line or straight line was introduced by ancient mathematicians to represent straight objects with negligible width... Point an entity that has a location in space or on a plane, but has no extent The notion of line or straight line was introduced by ancient mathematicians to represent straight objects with negligible width and depth. Lines are an idealization of such objects. a plane is a flat, two-dimensional surface. A plane is the two dimensional analogue of a point (zero-dimensions), a line (one-dimension) and a solid (three-dimensions).
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