What is the common systems of measuring angles?

1.	What is the common systems of measuring angles?
Answer» The common systems of measuring angles are: (a) Sexagesimal System: Here, one complete revolution is divided into 360 equal parts, each called a degree, a degree is divided into sixty equal parts, each called a second. Thus, One complete revolution = 360° 1° = 60' (minutes) 1' = 60'' (seconds) (b) Circular System: The unit of measuring an angle in this system is radian. A radian is the measure of the central angle subtended by an arc equal in length to the radius of the circle. 1 radian is written as 1^c.

Answer»

The common systems of measuring angles are:

(a) Sexagesimal System: Here, one complete revolution is divided into 360 equal parts, each called a degree, a degree is divided into sixty equal parts, each called a second. Thus,

One complete revolution = 360°

1° = 60' (minutes)

1' = 60'' (seconds)

(b) Circular System: The unit of measuring an angle in this system is radian. A radian is the measure of the central angle subtended by an arc equal in length to the radius of the circle. 1 radian is written as 1^c.

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