Table of Contents
- 1 What is the word protractor mean?
- 2 Who invented the protractor?
- 3 What is the purpose of a protractor?
- 4 How is a protractor made?
- 5 What is the origin of the word Saxon?
- 6 Why do protractors have two scales?
- 7 How is a protractor used to measure an angle?
- 8 Who was the first person to invent a protractor?
What is the word protractor mean?
measuring angles
: an instrument used for drawing and measuring angles. protractor. noun.
Who invented the protractor?
Joseph Huddart
Chart protractor. A more complex form of protractor, designed for plotting the position of a ship on navigational charts, was invented in 1801 by Joseph Huddart, a U.S. naval captain.
Where does the word angle originate from?
The word angle comes from the Latin word angulus, meaning “corner”; cognate words are the Greek ἀγκύλος (ankylοs), meaning “crooked, curved,” and the English word “ankle”. Both are connected with the Proto-Indo-European root *ank-, meaning “to bend” or “bow”.
What is the purpose of a protractor?
Measuring angles
Protractor/Purpose
How is a protractor made?
Fold a triangle with one edge from the upper left corner of the paper to the bottom center of the paper. This will create a 60º angle. Create the same fold from the right side to create a 120º angle. Mark these angles on your protractor.
What language is used in protractor?
Protractor is a NodeJS program which is written in JavaScript and runs with Node to identify the web elements in AngularJS applications, and it also uses WebDriver to control the browser with user actions.
What is the origin of the word Saxon?
1200, from Late Latin Saxonem (nominative Saxo; also source of French Saxon, Spanish Sajon, Italian Sassone), usually found in plural Saxones, probably from a West Germanic tribal name (represented by Old English Seaxe, Old High German Sahsun, German Sachse “Saxon”), traditionally regarded as meaning literally “warrior …
Why do protractors have two scales?
The two scales make it easy for us to measure angles facing different ways. To measure the size of angle ABC, place the protractor over the angle so that the centre of the protractor is directly over the angle’s vertex, B; and the base line of the protractor is along the arm, BA, of the angle.
What is the meaning of the word protractor?
1610s, “one who lengthens (an action),” Modern Latin agent noun from Latin protrahere “to draw forward” (see protraction). Medieval Latin protractor meant “one who calls or drags another into court.” The surveying sense of “instrument for measuring and drawing angles on paper” is recorded from 1650s.
How is a protractor used to measure an angle?
A protractor is a tool used to measure angles A protractor is a transparent plastic tool designed to measure angles. They are usually semicircular but also are available in a full circle 360° version. Origin The small hole near the bottom of the protractor is aligned over the vertexof the angle to be measured.
Who was the first person to invent a protractor?
Although the protractors are made to be one-sided, that confuse new learners, so it is much easier for them to have protractors with both parties. The first two-sided protractor was invented by Jake Adams, Musselburgh Grammar School math teacher in 2009.
How many parts are there in a protractor?
Depending on the measurement system, protractor can have radian scale or degrees scale on it. The protractor is usually had semi-circle size divided into one hundred and eighty parts or full circle divided into three hundred and sixty parts.