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Templates contain pre-dimensioned holes in the right scale to accurately draw a symbol or sign. Letter templates are used for drawing text, including digits and letter characters. Diagrams are usually of a standard letter shape and size to conform to standards of encodings (e.g. DIN or ANSI).
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 ...
Given this ease of changing sizes, it is of course common to copy or print a given document on different sizes of paper, especially within a series, e.g. a drawing on A3 may be enlarged to A2 or reduced to A4. The US customary "A-size" corresponds to "letter" size, and "B-size" corresponds to "ledger" or "tabloid" size.
When the ends differ in size, it is known as a reducing (or reducer) elbow. Clarity on the difference between plumbing terminologies and geometric angles: In plumbing, the term "45-degree elbow" for example, refers to the angle of bend from the original straight pipe position (0 degrees) to the new position (45 degrees), not the actual angle ...
Using a scale of chords or protractor, lay off two lines, "0a" that is 52° from OS, and "0b" that is 52° from OW. (they will be at right angles. The points "a" and "b" are important. With a straight edge draw a line connect E with "a", it cuts SN (the meridian line) at P, which is called the pole of the world. Now connect E to "a", it ...
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A half-circle protractor marked in degrees (180°). 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.
A scale model is a representation or copy of an object that is larger or smaller than the actual size of the object being represented. Very often the scale model is smaller than the original and used as a guide to making the object in full size. —