The semicircular instrument used to measure & construct angles is called this
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instruments used in mathematics and geometry - synonyms and ...
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Protractor - Wikipedia  A half circle protractor marked in degrees (180). A protractor is a measuring instrument, typically made of transparent plastic or glass, for measuring angles. Most protractors measure angles in degrees (). Radian-scale protractors measure angles in radians. Most protractors are divided into 180 equal parts.
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instruments used in mathematics and geometry - synonyms and ...  compasses. noun. a piece of equipment used for drawing circles, consisting of two thin parts joined in the shape of the letter V. dividers. noun. plumb line. noun. protractor. noun. ruler. noun. set square. noun. slide rule. noun. theodolite. noun.
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protractor | measurement instrument | Britannica.com  Any of a group of instruments used to construct and measure plane angles. ... device called the torquetum that was equipped with a semicircular protractor.
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Angles, Degrees, Protractors...Oh My! - Utah Education Network  Jul 10, 2008 ... The protractor is an instrument of measurement. A protractor is used to construct and measure angles. The simple ... We have units for measuring angles and they are called degrees. These are not the ... The simple protractor looks like a semicircular disk marked with degrees, from 0o to 180o. Angles are...
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Print Exercise 25: Special Senses - Hearing and Equilibrium ...  Print Exercise 25: Special Senses - Hearing and Equilibrium flashcards and study them anytime, anywhere. ... VESTIBULE, SEMICIRCULAR CANALS ... COCHLEAR DUCT ... HIGH PITCH SOUNDS MAKE IT CLOSE TO OVAL WINDOW, LOW PITCH ARE ... WHEN THE TUNING FORK HANDLE WAS PRESSED ON YOUR...
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Compass - Wikipedia  A compass is an instrument used for navigation and orientation that shows direction relative to ... The first compasses in ancient Han dynasty China were made of lodestone, ... This was supplanted in the early 20th century by the liquid-filled magnetic ... Modern compasses usually use a magnetized needle or dial inside a...
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Tools Flashcards | Quizlet  a screw head having two partial slots crossed at right angles, driven by a special ... a tool that has two narrow legs which can be adjusted to measure the...
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Surveyor's wheel - Wikipedia  A surveyor's wheel, also called a clickwheel, hodometer, waywiser, trundle wheel, measuring ... While the latter is derived to measure distances travelled by a vehicle, the former is ... A single wheel is attached to a handle and the device can be pushed or pulled along by a person walking. ... Trundle wheel  Odometer...
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Radian - Wikipedia  The radian is the standard unit of angular measure, used in many areas of mathematics. ... circumference divided by the radius, or 2r / r, or 2. Thus 2 radians is equal to 360 degrees, meaning that one radian is equal to 180/ degrees.
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Sextant - Wikipedia  A sextant is a doubly reflecting navigation instrument used to measure the angle between any ... The angle, and the time when it was measured, can be used to calculate a ... Both smaller and larger instruments are (or were) in use: the octant, quintant (or .... To check for this you need to observe two stars 90 or more apart.
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Compass - Wikipedia  A compass is an instrument used for navigation and orientation that shows direction relative to ... The magnetic field exerts a torque on the needle, pulling one end or pole of the needle approximately toward the .... Traditionally the card is divided into thirty-two points (known as rhumbs), although modern compasses are...
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Types of angles - Basic mathematics  Study the images carefully so you understand them. Acute angle: An angle whose measure is less than 90 degrees. The following is an acute angle.
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Sextant - Wikipedia  A sextant is a doubly reflecting navigation instrument used to measure the angle between any ... Most of what is said about these specific sextants applies equally to other types of sextants. ... The scales of the octant, sextant, quintant and quadrant are graduated from below zero to 90, 120, 140 and 180 respectively.
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Compass - Wikipedia  A compass is an instrument used for navigation and orientation that shows direction relative to the geographic "cardinal directions", or "points". Usually, a...
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Types of Angles | Acute Angle | Right Angle | Obtuse Angle | Straight ...  ... of angles. 1. Acute Angle: An angle whose measure is less than 90 is called an acute angle. ... Types of angles are discussed here according to their degree measure. 1. Acute Angle: ... An angle whose measure is greater than 90 but less than 180 is called an obtuse angle. ... Have your say about what you just read!
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What is a seven-sided shape called? | Reference.com  A seven-sided shape is called a heptagon. ... A polygon is defined as a two-dimensional or plane figure that consists of line segments, which are called edges or sides. ... Concave: has at least one angle that measures more than 180 degrees;...
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Theory of Gyrocompass - SlideShare  Jan 14, 2015 ... A gyroscope, not to be confused with gyrocompass, is a spinning ... for nautical navigation because it allowed accurate determination of a .... is different from, and navigationally more useful than, magnetic north. .... navigation the axis of rotation of gyro is aligned to point towards the geographical north.
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Degrees as a unit of angle measure - Math Open Reference  Discussion of the way angles are measured in degrees, minutes, seconds. ... In geometry, an angle. is measured in degrees, where a full circle is 360 degrees. ... into 60 seconds, However this last measure is so small, it only used where angles ... See also Degrees - Minutes - Seconds calculator for a calculator that can add...
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Patent US3269253 - Periscope sextant - Google Patents  These operate with a pivotable mirror in the top of the periscope which mirror is ... 2 the angle between two adjacent reflecting surfaces of each unit of body 6 is circa ... After two reflections in said prism 7 the beam is transmitted to the bottom of the ..... A periscope sextant as olaimed in claim 1 wherein a scale graduation is...
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LA Maritime Museum  Navigation Instruments  Navigation Instruments. Chronometer, Octant and Sextant: Navigation History ... But until the 20th century, ships used a variety of instruments to help them ... citing glass, their arcs were positioned to record a physical object near the horizon.