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The use of closely spaced parallel lines to indicate three-dimensionality is called hatching.

Three-dimensional space (also called 3D space, 3-space, or less commonly three-dimensional space) is a geometric environment in which three values ​​(called parameters) are required to determine the location of an element (that is, a point) . ). This is the informal meaning of the term dimension.

In mathematics, a tuple of n numbers can be thought of as the Cartesian coordinates of a position in n-dimensional Euclidean space. The set of these n-tuples is commonly denoted as display style \mathbb {R} {\displaystyle \mathbb {R} ^{n},} and can be identified in n-dimensional Euclidean space. For n = 3, this space is called 3-dimensional Euclidean space (or just Euclidean space when the context is clear) [1]. It serves as a model of the physical universe in which all known matter exists (if relativity is not taken into account). Although this space remains one of the most fascinating and useful ways of modeling the world as it is experienced.

Learn more about three-dimensionality here: https://brainly.com/question/326906

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