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2. Goniometer - Wikipedia

   en.wikipedia.org/wiki/Goniometer

   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.

3. Compass - Wikipedia

   en.wikipedia.org/wiki/Compass

   A magnetic card compass is usually equipped with an optical, lensatic, or prismatic sight, which allows the user to read the bearing or azimuth off the compass card while simultaneously aligning the compass with the objective (see photo). Magnetic card compass designs normally require a separate protractor tool in order to take bearings ...

4. Straightedge and compass construction - Wikipedia

   en.wikipedia.org/wiki/Straightedge_and_compass...

   The compass can have an arbitrarily large radius with no markings on it (unlike certain real-world compasses). Circles and circular arcs can be drawn starting from two given points: the centre and a point on the circle. The compass may or may not collapse (i.e. fold after being taken off the page, erasing its 'stored' radius).

5. Parallel rulers - Wikipedia

   en.wikipedia.org/wiki/Parallel_rulers

   In the 19th century a retired sea captain, Captain William Andrew Field [Note 1] improved the design by adding a protractor-style scale to the upper edge of one rule, and compass points to the opposing edge, which made reading bearings easier. [2] Examples exist of boxwood, ivory or ebony, usually with brass hinges.

6. List of interactive geometry software - Wikipedia

   en.wikipedia.org/wiki/List_of_interactive...

   Live Geometry is a free CodePlex project that lets you create interactive ruler and compass constructions and experiment with them. It is written in Silverlight 4 and C# 4.0 (Visual Studio 2010). The core engine is a flexible and extensible framework that allows easy addition of new figure types and features.

7. Silva compass - Wikipedia

   en.wikipedia.org/wiki/Silva_compass

   Silva Voyager compass (Brunton 9020) Silva Sweden AB created their first compass in 1928, and established their company in 1933. Below is a Chronological timeline of important dates in the history of Silva Sweden AB: [3] 1928 Gunnar Tillander invents the first orienteering (baseplate) compass. [4] [5] [6]

8. Compass (drawing tool) - Wikipedia

   en.wikipedia.org/wiki/Compass_(drawing_tool)

   A beam compass and a regular compass Using a compass A compass with an extension accessory for larger circles A bow compass capable of drawing the smallest possible circles. A compass, also commonly known as a pair of compasses, is a technical drawing instrument that can be used for inscribing circles or arcs.

9. List of measuring instruments - Wikipedia

   en.wikipedia.org/wiki/List_of_measuring_instruments

   protractor: angle psychrometer: humidity pycnometer: fluid density pyranometer: solar radiation pyrheliometer: direct solar insolation pyrometer: high temperatures quadrat: percentage cover of a certain species quartz crystal microbalance: thickness of deposited thin films rain gauge: measuring of rain radiometer: radiant flux of ...