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2. Mathematical instrument - Wikipedia

   en.wikipedia.org/wiki/Mathematical_instrument

   The Oxford Set of Mathematical Instruments is a set of instruments used by generations of school children in the United Kingdom and around the world in mathematics and geometry lessons. It includes two set squares, a 180° protractor, a 15 cm ruler, a metal compass, a metal divider, a 9 cm pencil, a pencil sharpener, an eraser and a 10mm stencil.

3. Ruler - Wikipedia

   en.wikipedia.org/wiki/Ruler

   A variety of rulers A carpenter's rule Retractable flexible rule or tape measure A closeup of a steel ruler A ruler in combination with a letter scale. A ruler, sometimes called a rule, scale or a line gauge or metre/meter stick, is an instrument used to make length measurements, whereby a length is read from a series of markings called "rules" along an edge of the device. [1]

4. Helix (stationery company) - Wikipedia

   en.wikipedia.org/wiki/Helix_(stationery_company)

   Helix was established in 1887 under the name 'The Universal Woodworking Company Ltd.'; it manufactured wooden rulers and metal laboratory apparatus. In 1894, it patented the drawing compass and, with it, launched the Helix brand, following on from the initial success of the compass and rule. In 1912, the company's first mathematical set was ...

5. Screwfix - Wikipedia

   en.wikipedia.org/wiki/Screwfix

   Screwfix Direct Limited, trading as Screwfix, is a retailer of trade tools, accessories and hardware products based in the United Kingdom. [6] Founded in 1979 as the Woodscrew Supply Company, the company was acquired in July 1999 by Kingfisher plc , which also owns B&Q , and is listed on the London Stock Exchange .

6. Combination square - Wikipedia

   en.wikipedia.org/wiki/Combination_square

   Both faces of the rule have markings, providing four different sets of markings. This allows different sides to have different graduations (eg. 1mm or 0.5mm markings) or units (ie. metric and imperial). The rule typically comes in lengths between 150mm and 600mm or between 4 inches and 24 inches. [1] [2]

7. Straightedge and compass construction - Wikipedia

   en.wikipedia.org/wiki/Straightedge_and_compass...

   The same set of points can often be constructed using a smaller set of tools. For example, using a compass, straightedge, and a piece of paper on which we have the parabola y=x 2 together with the points (0,0) and (1,0), one can construct any complex number that has a solid construction. Likewise, a tool that can draw any ellipse with already ...