Angle, Turn

A turn is 360°. As an angular unit it is mainly useful for large angles, such as in connection with coils and rotating objects. See also winding number. The British astronomer and science writer Sir Fred Hoyle (1915 - 2001) in Astronomy (London 1962), proposed dividing the circle, or turn into 1000 milliturns. with each milliturn corresponding to an angle of 21' 36", or less than half a degree. Read more

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An angle is the figure formed by two rays sharing a common endpoint, called the vertex of the angle. Angles provide a means of expressing the difference in slope between two rays meeting at a vertex without the need to explicitly define the slopes of the two rays. Angles are studied in geometry and trigonometry. Read more

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Angle, Turn

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