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  2. Order-5 truncated pentagonal hexecontahedron - Wikipedia

    en.wikipedia.org/wiki/Order-5_truncated...

    The order-5 truncated pentagonal hexecontahedron is a convex polyhedron with 72 faces: 60 hexagons and 12 pentagons triangular, with 210 edges, and 140 vertices. Its dual is the pentakis snub dodecahedron. It is Goldberg polyhedron {5+,3} 2,1 in the icosahedral family, with chiral symmetry. The relationship between pentagons steps into 2 ...

  3. Pentagonal hexecontahedron - Wikipedia

    en.wikipedia.org/wiki/Pentagonal_hexecontahedron

    3D model of a pentagonal hexecontahedron. The faces are irregular pentagons with two long edges and three short edges. Let be the real zero of the polynomial +.Then the ratio of the edge lengths is given by: = +.

  4. Truncated order-5 pentagonal tiling - Wikipedia

    en.wikipedia.org/wiki/Truncated_order-5...

    In geometry, the truncated order-5 pentagonal tiling is a regular tiling of the hyperbolic plane. It has Schläfli symbol of t 0,1 {5,5}, constructed from one pentagons and two decagons around every vertex.

  5. Chamfered dodecahedron - Wikipedia

    en.wikipedia.org/wiki/Chamfered_dodecahedron

    In geometry, the chamfered truncated icosahedron is a convex polyhedron with 240 vertices, 360 edges, and 122 faces, 110 hexagons and 12 pentagons. It is constructed by a chamfer operation to the truncated icosahedron , adding new hexagons in place of original edges.

  6. Truncated hexagonal tiling - Wikipedia

    en.wikipedia.org/wiki/Truncated_hexagonal_tiling

    In geometry, the truncated hexagonal tiling is a semiregular tiling of the Euclidean plane.There are 2 dodecagons (12-sides) and one triangle on each vertex.. As the name implies this tiling is constructed by a truncation operation applied to a hexagonal tiling, leaving dodecagons in place of the original hexagons, and new triangles at the original vertex locations.

  7. ASTM A325 - Wikipedia

    en.wikipedia.org/wiki/ASTM_A325

    ASTM A325 is an ASTM International standard for heavy hex structural bolts, titled Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength. It defines mechanical properties for bolts that range from 1 ⁄ 2 to 1 + 1 ⁄ 2 inches (13 to 38 mm) in diameter.

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