Measurement of Angles

Things to remember

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• Angles are the shape formed by two lines or rays which are diverging from a common point or the vertex.
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• In the Sexagesimal system, the right angle is divided into 90 equal parts and each part is called a degree.
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• In this system, a right angle is divided into two equal parts and each part is known as a grade.
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• Radian is the plane angle subtended by a circular arc as the length of the arc divided by the radius of the arc.
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