¶ Fourth Dimension
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Index Entry
That is one of the reasons why our eyes were deceived when we took the two halves of the 120-ball tetrahedron that were made out of 60 balls each. We tended to look at them three-dimensionally, that is rectilinearly, and did not see how we could bring two oblong quadrangular facets together with their long axes crossing one another at right angles. But they were coming together in converging and diverging and not in parallelism: We are dealing in a four-dimensional system.
