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The design for example is typical of a japanese origami folding technique for a pinwheel. [citation needed] During the nineteenth century in the United States, any wind-driven toy held aloft by a running child was characterized as a whirligig, including pinwheels. Pinwheels provided many children with numerous minutes of enjoyment and amusement ...
A pinwheel fold. Valley-fold a square into thirds between both pairs of edges, creating nine sub-squares. Cut a diagonal X across the entire center square, pinwheel-fold the outer edges, and fold the protruding pinwheel flaps inward, interleaving them to produce a multilayered square with the top woven together. Fold outward the triangular ...
Federation Square's sandstone façade. Federation Square, a building complex in Melbourne, Australia, features the pinwheel tiling.In the project, the tiling pattern is used to create the structural sub-framing for the facades, allowing for the facades to be fabricated off-site, in a factory and later erected to form the facades.
Shoji are most commonly filled with a single sheet of paper, pasted across the back of the frame (on the outer side). Shoji may also be papered on both sides, which increases thermal insulation and sound absorption; the frame is still visible in silhouette. [51] futsū ("common") shoji (普通障子) have a frame on one side, paper on the other [6]
Any curve of constant width can form a rotor within a square, a shape that can perform a complete rotation while staying within the square and at all times touching all four sides of the square. However, the Reuleaux triangle is the rotor with the minimum possible area. [ 9 ]
The pattern represented by every finite patch of tiles in a Penrose tiling occurs infinitely many times throughout the tiling. They are quasicrystals : implemented as a physical structure a Penrose tiling will produce diffraction patterns with Bragg peaks and five-fold symmetry, revealing the repeated patterns and fixed orientations of its ...
Dots and boxes is a pencil-and-paper game for two players (sometimes more). It was first published in the 19th century by French mathematician Édouard Lucas , who called it la pipopipette . [ 1 ] It has gone by many other names, [ 2 ] including dots and dashes , game of dots , [ 3 ] dot to dot grid , [ 4 ] boxes , [ 5 ] and pigs in a pen .
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