What is the definition of protractor03.04.2021
Definition of protractor. 1 a: one that protracts. b: a muscle that extends a part. 2: an instrument for laying down and measuring angles in drawing and plotting. pro•trac•tor. (pro??tr?k t?r, pr?-) n. 1. (in surveying, mathematics, etc.) an instrument having a graduated arc for plotting or measuring angles. 2. one that protracts. 3. any muscle that serves to extend a part of the body; extensor.
Then, if we have a protractorwe may apply it to the lines and see defintiion many degrees of angle they contain. The student should have and use a what tea is good for congestion and sore throatsuch as is furnished with ix book, for the numerous exercises which are to follow. Rule another line along the same edge of the board as before and with a protractor measure the angle between these lines.
At that point find, by means of a protractorthe angle a projection of the chord makes with the face of the beam.
No witness could tell more truth than the compass pritractor protractor of Mr. Smith which were free from prejudice and partiality. New Word List Word List. Save This Word! The Oxford comma vexes many a writer to use or not to use! Whether you're a fan of the Oxford comma or not, take this quiz to see how good you are at protractorr it and commas in general correctly.
Origin of protractor From Medieval Latin, dating back to —15; see origin at protract-tor. Words nearby protractor protozoophageprotractprotractedprotractile protrsctor, protractionprotractorprotriptylineprotrudeprotruded diskprotrusileprotrusion.
Example sentences from the Web for protractor Then, if we have a protractorwe may apply it to the lines and see how many degrees of angle they contain. The Aeroplane Speaks H. Sages and Heroes of the American Revolution L. Carroll Judson. A muscle that extends a limb or other part. Published by Houghton Mifflin Company. Tired of Typos?
Get Help Now!
a person or thing that protracts. (in surveying, mathematics, etc.) an instrument having a graduated arc for plotting or measuring angles. Anatomy. a muscle that causes a part to protrude. 1 An instrument for measuring angles, typically in the form of a flat semicircle marked with degrees along the curved edge. ‘Do you need a protractor to measure their angles?’. ‘The angle of pinnation was found by placing a protractor along the central tendon and measuring the angle of an individual fiber to the nearest degree.’. ‘A protractor was used to measure the angle of this line to . / pr??tr?k.t? r/ a device used for measuring and drawing angles. It is usually in the form of half a circle made from transparent plastic with degrees printed on it.
A protractor is a measuring instrument , typically made of transparent plastic or glass, for measuring angles. Some protractors are simple half-discs. More advanced protractors, such as the bevel protractor , have one or two swinging arms, which can be used to help measure the angle. Radian-scale protractors measure angles in radians. Most protractors are divided into equal parts.
Some precision protractors further divide degrees into arcminutes. They are used for a variety of mechanical and engineering-related applications.
One common use is in geometry lessons in schools. A bevel protractor is a graduated circular protractor with one pivoted arm; used for measuring or marking off angles. Sometimes Vernier scales are attached to give more precise readings. It has wide application in architectural and mechanical drawing, although its use is decreasing with the availability of modern drawing software or CAD.
Universal bevel protractors are also used by toolmakers; as they measure angles by mechanical contact they are classed as mechanical protractors. The bevel protractor is used to establish and test angles to very close tolerances. The bevel protractor consists of a beam, a graduated dial and a blade which is connected to a swivel plate with Vernier scale by thumb nut and clamp. When the edges of the beam and blade are parallel, a small mark on the swivel plate coincides with the zero line on the graduated dial.
Since the spaces, both on the main scale and the Vernier scale, are numbered both to the right and to the left from zero, any angle can be measured.
The readings can be taken either to the right or to the left, according to the direction in which the zero on the main scale is moved. From Wikipedia, the free encyclopedia. Angle measuring instrument. 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. This article may be confusing or unclear to readers. Please help clarify the article. There might be a discussion about this on the talk page.
September Learn how and when to remove this template message. A gon protractor marked in gradians. Tool Test. Popular Mechanics. ISSN Retrieved 12 April Handbook of Dimensional Measurement. Industrial Press Inc. ISBN Measuring and alignment tools. Categories : Dimensional instruments Mathematical tools Navigational equipment Technical drawing tools. Hidden categories: Articles with short description Short description matches Wikidata Articles needing additional references from August All articles needing additional references Wikipedia articles needing clarification from September All Wikipedia articles needing clarification Commons category link is on Wikidata Wikipedia articles with LCCN identifiers Wikipedia articles with MA identifiers.
Namespaces Article Talk. Views Read Edit View history. Help Learn to edit Community portal Recent changes Upload file. Download as PDF Printable version. Wikimedia Commons. Wikimedia Commons has media related to Protractors.