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the angle song
its good

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Angles Song | Acute, Obtuse, & Right Angles | 3rd & 4th Grade

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the protractor is an instrument used for measuring angles. It is usually made of transparent glass or transparent plastic. 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.

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the protractor is an instrument used for measuring angles. It is usually made of transparent glass or transparent plastic. 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.

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A related instrument used by marine navigators is the course protractor. It provides an effective tool with which to measure the angular distance between magnetic north and the course plotted on a navigational chart.

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A protractor is an instrument for measuring angles, normally in the form of a flat semicircle marked with numbers along the curved edge.

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The Protractor was discoverd in 1801 by joseph huddart.

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The protractor is over 500 years old. Thomas Blundeville described a tool specifically for drawing and measuring angles in his 1589 Briefe Description of Universal Mappes & Cardes

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The protractor is over 500 years old. Thomas Blundeville described a tool specifically for drawing and measuring angles in his 1589 Briefe Description of Universal Mappes & Cardes

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yuhan cruz

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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.

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Protractor is called a three-arm protractor or station pointer, is composed of a circular scale connected to three arms. 

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Protractor is called a three-arm protractor or station pointer, is composed of a circular scale connected to three arms. 

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Protractor is a device for measuring the size of angles or drawing angles of specified sizes.

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Protractor is a device for measuring the size of angles or drawing angles of specified sizes.

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protractor. 1610s, "one who lengthens (an action)," from Medieval Latin protractor, agent noun from Latin protrahere "to draw forward"; sense of "instrument for drawing angles" first recorded 1650s.

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Protractors have traditionally been one-sided, but they confuse learners who have just started measuring angles, so in 2009, Jake Adamson, who was a mathematics teachers at Musselburgh Grammar School in Scotland.

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the pro tractor made by Joseph Huddard is not the one we are using for math right now

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the pro tractor made by Joseph Huddard is not the one we are using for math right now

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History of Mathematics : Who Invented the Protractor?