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Corresponding Polyhedra in the Three Spaces of Constant Curvature
Published online by Cambridge University Press: 20 November 2018
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The five Platonic solids can be drawn in elliptic or hyperbolic space just as well as in Euclidean space. Their numerical properties are, of course, the same in all three. So are the various angles subtended at the centre. But the face-angles and dihedral angles are greater in elliptic space, smaller in hyperbolic. It is a special feature of the non-Euclidean spaces that we cannot change the size of a solid without changing its shape.
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- Copyright © Canadian Mathematical Society 1953