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  2. Square (tool) - Wikipedia

    en.wikipedia.org/wiki/Square_(tool)

    A square is a tool used for marking and referencing a 90° angle, though mitre squares are used for 45° angles. Squares see common use in woodworking, metalworking, construction and technical drawing. [1] Some squares incorporate a scale for measuring distances (a ruler) or for calculating angles.

  3. Speed square - Wikipedia

    en.wikipedia.org/wiki/Speed_square

    A Speed Square, also generically called a rafter square, rafter angle square, and triangle square, is a multi-purpose triangular carpenters' tool used for marking out. Its functions encompass many of those offered by combination squares , try squares , and framing squares .

  4. Set square - Wikipedia

    en.wikipedia.org/wiki/Set_square

    Similar to the Geodreieck, a number of other protractor triangle types exist for navigation purposes. Various designs are named navigation (protractor) triangle, nautical navigational triangle, nautical set square, Portland (navigational) triangle or Portland protractor triangle, Kent-type triangle, Inoue-type A/B nautical triangle or plotting triangle, course triangle, yachtsmen triangle, and ...

  5. Technical drawing tool - Wikipedia

    en.wikipedia.org/wiki/Technical_drawing_tool

    Tools such as pens and pencils mark the drawing medium. Other tools such as straight edges, assist the operator in drawing straight lines, or assist the operator in drawing complicated shapes repeatedly. Various scales and the protractor are used to measure the lengths of lines and angles, allowing accurate scale drawing to be carried out.

  6. Goniometer - Wikipedia

    en.wikipedia.org/wiki/Goniometer

    A protractor is a measuring instrument, typically made of transparent plastic, for measuring angles. Some protractors are simple half-discs or full circles. More advanced protractors, such as the bevel protractor, have one or two swinging arms, which can be used to help measure the angle. Most protractors measure angles in degrees (°).

  7. 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]

  8. T-square - Wikipedia

    en.wikipedia.org/wiki/T-square

    Drafting board with a T-square and triangle. A T-square is a technical drawing instrument used by draftsmen primarily as a guide for drawing horizontal lines on a drafting table. The instrument is named after its resemblance to the letter T, with a long shaft called the "blade" and a short shaft called the "stock" or "head".

  9. Biltmore stick - Wikipedia

    en.wikipedia.org/wiki/Biltmore_stick

    It looks much like an everyday yardstick. With practice a Biltmore stick is considered to be exceptionally accurate, often within half an inch on diameters. Some foresters use the tool regularly, however, many prefer to use more accurate tools such as a diameter tape to measure diameter at breast height (DBH) and a clinometer to measure height ...