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| Fig. 100.120 Image of Icosa and Tetra: Photograph of a truncated glass tetrahedron with frosted triangular facets producing an image of clustered tetrahedra that approximate an icosahedron. (See discussion at Sec. 934.) |
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| Fig. 100.120 Image of Icosa and Tetra: Photograph of a truncated glass tetrahedron with frosted triangular facets producing an image of clustered tetrahedra that approximate an icosahedron. (See discussion at Sec. 934.) |