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Key terms: abbott applying dimensional analogy bounded convex coordinate cube cylinder depth dimensional analogy dimensions directions einstein euclidean space extrude faces familiar flatland foreshortening four dimensions fourth dimension fourth direction geometry higher dimensions indirect information infer knots mathematicians objects obscured one may infer orthogonal perspective pi r polyhedra polytope projection relativity retina seen here shadow shone space spatial tesseract third dimension vector volumes wireframe world would cast would be able to see Search external links cited by footnotes on Wikipedia page Fourth dimension: |
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