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  2. Packing problems - Wikipedia

    en.wikipedia.org/wiki/Packing_problems

    The hexagonal packing of circles on a 2-dimensional Euclidean plane. These problems are mathematically distinct from the ideas in the circle packing theorem.The related circle packing problem deals with packing circles, possibly of different sizes, on a surface, for instance the plane or a sphere.

  3. List of centroids - Wikipedia

    en.wikipedia.org/wiki/List_of_centroids

    Cuboid: a, b = the sides of the cuboid's base c = the third side of the cuboid Right-rectangular pyramid: a, b = the sides of the base h = the distance is from base ...

  4. Cuboid - Wikipedia

    en.wikipedia.org/wiki/Cuboid

    Etymologically, "cuboid" means "like a cube", in the sense of a convex solid which can be transformed into a cube (by adjusting the lengths of its edges and the angles between its adjacent faces). A cuboid is a convex polyhedron whose polyhedral graph is the same as that of a cube. [1] [2] General cuboids have many different types.

  5. Cube - Wikipedia

    en.wikipedia.org/wiki/Cube

    A cube is a special case of rectangular cuboid in which the edges are equal in length. [1] Like other cuboids, every face of a cube has four vertices, each of which connects with three congruent lines. These edges form square faces, making the dihedral angle of a cube between every two adjacent squares being the interior angle of a square, 90 ...

  6. Solid geometry - Wikipedia

    en.wikipedia.org/wiki/Solid_geometry

    A cube, except that its faces are not squares but rhombi; Cuboid: A convex polyhedron bounded by six quadrilateral faces, whose polyhedral graph is the same as that of a cube [4] Some sources also require that each of the faces is a rectangle (so each pair of adjacent faces meets in a right angle).

  7. Rectangular cuboid - Wikipedia

    en.wikipedia.org/wiki/Rectangular_cuboid

    A rectangular cuboid with integer edges, as well as integer face diagonals, is called an Euler brick; for example with sides 44, 117, and 240. A perfect cuboid is an Euler brick whose space diagonal is also an integer. It is currently unknown whether a perfect cuboid actually exists. [6] The number of different nets for a simple cube is 11 ...

  8. QB Room: If the Eagles implode again, they can thank the ...

    www.aol.com/sports/qb-room-eagles-implode-again...

    Let the math do the mathing and the result is basically 12 fewer pass attempts (and 12 fewer targets) for the surrounding skill position players. And Brown, as you would suspect, has clearly been ...

  9. Combination puzzle - Wikipedia

    en.wikipedia.org/wiki/Combination_puzzle

    The Minus Cube is a 3D mechanical variant of the n-puzzle. It consists of a bonded transparent plastic box containing seven small cubes. There is an empty space the size of one small cube inside the box and the small cubes are moveable inside the box by tilting the box causing a cube to fall into the space. Commercial Name: Rubik's Clock