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2. Sphere packing - Wikipedia

   en.wikipedia.org/wiki/Sphere_packing

   Sphere packing finds practical application in the stacking of . In geometry, a sphere packing is an arrangement of non-overlapping spheres within a containing space. The spheres considered are usually all of identical size, and the space is usually three- dimensional Euclidean space. However, sphere packing problems can be generalised to ...

3. Close-packing of equal spheres - Wikipedia

   en.wikipedia.org/wiki/Close-packing_of_equal_spheres

   Close-packing of equal spheres. In geometry, close-packing of equal spheres is a dense arrangement of congruent spheres in an infinite, regular arrangement (or lattice ). Carl Friedrich Gauss proved that the highest average density – that is, the greatest fraction of space occupied by spheres – that can be achieved by a lattice packing is.

4. Manipulative (mathematics education) - Wikipedia

   en.wikipedia.org/wiki/Manipulative_(mathematics...

   Cuisenaire rods in a staircase arrangement Interlocking "multilink" linking cubes A Polydron icosahedron. In mathematics education, a manipulative is an object which is designed so that a learner can perceive some mathematical concept by manipulating it, hence its name. The use of manipulatives provides a way for children to learn concepts ...

5. The Best Gift for Any 8 Year Old Might Just Be a Good Old ...

   www.aol.com/gifts-highly-discerning-8-olds...

   The Best Gifts for 8 Year-Olds. STMT DIY Beaded Jewelry Kit, $16 on Amazon. Junie B. Jones Complete Kindergarten Collection, $45 on Amazon. Fidget Cube, $12 on Amazon. Dog Man: The Supa Epic ...

6. Circle packing - Wikipedia

   en.wikipedia.org/wiki/Circle_packing

   The most efficient way to pack different-sized circles together is not obvious. In geometry, circle packing is the study of the arrangement of circles (of equal or varying sizes) on a given surface such that no overlapping occurs and so that no circle can be enlarged without creating an overlap. The associated packing density, η, of an ...

7. Polycube - Wikipedia

   en.wikipedia.org/wiki/Polycube

   A puzzle involving arranging nine L tricubes into a 3×3×3 cube. A polycube is a solid figure formed by joining one or more equal cubes face to face. Polycubes are the three-dimensional analogues of the planar polyominoes. The Soma cube, the Bedlam cube, the Diabolical cube, the Slothouber–Graatsma puzzle, and the Conway puzzle are examples ...