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    J4

    Visual representation

    Visual representation

    Alternate name

    J4

    Combinatorial properties

    vertices | 12 edges | 20 faces | 10 (4 triangles, 5 quadrilaterals, 1 octagon)

    Edge lengths

    1 (20 edges)

    Geometric properties

    volume | 1 + (2 sqrt(2))/3≈1.94281 surface area | 7 + 2 sqrt(2) + sqrt(3)≈11.5605 circumradius | 1/2 sqrt(5 + 2 sqrt(2))≈1.39897 (assuming unit edge length)

    Net

    Net

    Skeleton graph

    Johnson solid skeleton 4

    Dual skeleton graph

    (not a named graph)

    Properties

    amphichiral | convex | equilateral | Johnson | rigid | simple

    Associated person

    Norman Johnson

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