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Transparent rulers are perfect for professionals. Popular with architects and designers, as they can see exactly what they're doing while drawing. If you're targeting kids, you might want to think in terms of multicolour rulers. Flexible rulers or even custom-shaped rulers can inject more interest and some fun! A child will more likely buy an orange or red ruler rather than a transparent one. 4. Rulers reach a wide audience spanning all age groups!

Cherry, Dan. "Collector's guide to rules", Furniture & Cabinetmaking, no. 259, July 2017, ISSN 1365-4292, pp.52–6 Klein, Herbert A. The science of measurement: a historical survey. Reprint, unabridged, corr. republ. der Ausg. New York, Simon & Schuster, 1974. ed. New York, NY: Dover, 1988. Print.Russell, David R.; with photography by James Austin and foreword by David Linley (2010). Antique Woodworking Tools: Their Craftsmanship from the Earliest Times to the Twentieth Century, Cambridge: John Adamson ISBN 978-1-898565-05-5 OCLC 727125586, pp.64–74 ruler noun - Definition, pictures, pronunciation and usage notes - Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com". www.oxfordlearnersdictionaries.com. Archived from the original on 25 October 2017 . Retrieved 25 April 2018. Find sources: "Ruler"– news · newspapers · books · scholar · JSTOR ( November 2023) ( Learn how and when to remove this template message)

A ruler and compass construction refers to constructions using an unmarked ruler and a compass. It is possible to bisect an angle into two equal parts with a ruler and compass. It can be proved, though, that it is impossible to divide an angle into three equal parts using only a compass and straightedge— the problem of angle trisection. However, should two marks be allowed on the ruler, the problem becomes solvable. We have literally hundreds of different rulers to choose from in many different styles and colours with prices to meet even the tightest of marketing budgets. With such a great choice on offer, fast turnarounds and guaranteed low prices, there is little wonder why we are the UK market leaders! A variety of rulers A m (6 ft 6 + 3⁄ 4 in) 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, is an instrument used to make length measurements, whereby a user estimates a length by reading from a series of markings called "rules" along an edge of the device. [1] Commonly the instrument is rigid and the edge itself is a straightedge ("ruled straightedge"), which additionally allows one to draw straight lines. Some rulers, such as cloth or paper tape measures, are non-rigid. Specialty rulers exist that have flexible edges that retain a chosen shape; these find use in sewing, arts, and crafts. Our Professional Scale Ruler is ideal for giveaways at building or architecture-centred trade shows and exhibitions. The pros will make endless use of this painstakingly precise ruler, which is available in stylish white and can be printed in colour with your logo.Anton Ullrich invented the folding ruler in 1851. Frank Hunt later made the flexible ruler in 1902. [7] Curved and flexible rulers [ edit ] This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. In geometry, a ruler without any marks on it (a straightedge) may be used only for drawing straight lines between points. A straightedge is also used to help draw accurate graphs and tables. Flexible Ruler Invented by Frank G. Hunt". National Museum of National History. Archived from the original on 30 June 2016 . Retrieved 7 June 2016.