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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.
Breton plotter. A Breton plotter (French: Rapporteur Breton), also known as a Portland course plotter or Weems protractor named after later manufacturers producing similar devices, is a navigational instrument used for nautical navigation with charts.
A 360 degrees protractor with graduations in degree: Date: 2 December 2007: Source: Personal work, based on a public domain licensed file, downloaded from Wikipedia (Image:Protractor.svg) Author: Georges Khaznadar <georgesk@ofset.org> Other versions
The Mercator projection in normal aspect maps trajectories of constant bearing (called rhumb lines or loxodromes) on a sphere to straight lines on the map, and is thus uniquely suited to marine navigation: courses and bearings are measured using a compass rose or protractor, and the corresponding directions are easily transferred from point to ...
At least one All-Star will be sidelined for the NBA's Christmas day showcase. The Phoenix Suns have ruled out guard Devin Booker for their Christmas nightcap against the Denver Nuggets. Booker ...
Key Points. Starbucks is reversing its previous open door policy. Now, customers will have to make a purchase if they want to work from their local coffee shop.