Circles of Sphere, Rhombic Polyhedra

Tangents from a Point to a Circle on Sphere

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12 Circles Meeting at 12 Points

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Is it a Regular Polygon?

Four Mutually Tangent Disks

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20 Tetrahedra

Triangles Generated by Edges and Center

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Rhombic Triacontahedron

Rhombic Dodecahedron

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