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  2. Graph paper - Wikipedia

    en.wikipedia.org/wiki/Graph_paper

    Hexagonal paper shows regular hexagons instead of squares. These can be used to map geometric tiled or tesselated designs among other uses. Isometric graph paper or 3D graph paper is a triangular graph paper which uses a series of three guidelines forming a 60° grid of small triangles. The triangles are arranged in groups of six to make hexagons.

  3. Paper size - Wikipedia

    en.wikipedia.org/wiki/Paper_size

    If one accepts some trimming, the size is indeed one quarter of the old Imperial paper size known as Demy, 17 + 1 ⁄ 2 in × 22 + 1 ⁄ 2 in (444 mm × 572 mm). [29] Manufacturers of computer printers, however, recognize inch-based Quarto as 10 + 5 ⁄ 6 or 10.83 in (275 mm) long.

  4. Hexagon - Wikipedia

    en.wikipedia.org/wiki/Hexagon

    The longest diagonals of a regular hexagon, connecting diametrically opposite vertices, are twice the length of one side. From this it can be seen that a triangle with a vertex at the center of the regular hexagon and sharing one side with the hexagon is equilateral, and that the regular hexagon can be partitioned into six equilateral triangles.

  5. ISO 216 - Wikipedia

    en.wikipedia.org/wiki/ISO_216

    An adjunct to the ISO paper sizes, particularly the A series, are the technical drawing line widths specified in ISO 128. For example, line type A ("Continuous - thick", used for "visible outlines") has a standard thickness of 0.7 mm on an A0-sized sheet, 0.5 mm on an A1 sheet, and 0.35 mm on A2, A3, or A4. [10]

  6. Isometric projection - Wikipedia

    en.wikipedia.org/wiki/Isometric_projection

    The term "isometric" comes from the Greek for "equal measure", reflecting that the scale along each axis of the projection is the same (unlike some other forms of graphical projection). An isometric view of an object can be obtained by choosing the viewing direction such that the angles between the projections of the x , y , and z axes are all ...

  7. Pascal's theorem - Wikipedia

    en.wikipedia.org/wiki/Pascal's_theorem

    However, the theorem remains valid in the Euclidean plane, with the correct interpretation of what happens when some opposite sides of the hexagon are parallel. If exactly one pair of opposite sides of the hexagon are parallel, then the conclusion of the theorem is that the "Pascal line" determined by the two points of intersection is parallel ...

  8. Mathematics of paper folding - Wikipedia

    en.wikipedia.org/wiki/Mathematics_of_paper_folding

    In 1999, a theorem due to Haga provided constructions used to divide the side of a square into rational fractions. [19] [20] In late 2001 and early 2002, Britney Gallivan proved the minimum length of paper necessary to fold it in half a certain number of times and folded a 4,000-foot-long (1,200 m) piece of toilet paper twelve times. [21] [22]

  9. Apothem - Wikipedia

    en.wikipedia.org/wiki/Apothem

    Apothem of a hexagon Graphs of side, s; apothem, a; and area, A of regular polygons of n sides and circumradius 1, with the base, b of a rectangle with the same area. The green line shows the case n = 6. The apothem (sometimes abbreviated as apo [1]) of a regular polygon is a line