PROTRACTER Meaning and
Definition
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A protractor is a geometric instrument used for measuring angles in a precise and accurate manner. This tool typically consists of a semicircular or circular plastic or metal disc with markings and a rotating arm, allowing for angular measurement and calculation.
The principal function of a protractor is to determine the degree of rotation or inclination between two lines or surfaces. It is especially useful in geometry, engineering, and various mathematical applications that involve angular measurement. The circular or semicircular disc is marked with a series of smaller units, typically in degrees, representing the full 360 degrees.
To use a protractor, one aligns the base line or center point of the protractor with the vertex of the angle to be measured. With the arm of the protractor aligned with one of the lines forming the angle, the degree measure can be easily read from the markings on the disc. Additionally, protractors may have additional markings, such as radians, to provide different systems of measurement.
Protractors are available in various forms and sizes, including handheld protractors and larger, transparent protractors designed for use on a flat surface. Some modern protractors include additional features such as magnifying lenses, rulers, and special designs for ease of use. The accurate measurement capability of a protractor makes it an essential tool for geometry education, design, architecture, and any field that involves angular measurement and calculation.
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One who protracts or lengthens in time.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
Common Misspellings for PROTRACTER
Etymology of PROTRACTER
The word "protractor" is derived from the Latin word "protractus", which means "drawn forth" or "prolonged". It is a combination of the prefix "pro" (meaning "forward" or "forth") and the verb "tractus" (meaning "drawn" or "dragged"). The term "protractor" originally referred to a drawing instrument used in geometry to measure or draw angles. It has been in use since the early 17th century, and its etymology reflects its purpose of extending or prolonging lines to measure angles.
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