Question

The length of the arc of a sector of a circle of radius r and central angle θ is equal to (A) 2r (1+ πθ/720°) (B) 2r (1+ πθ/360°) (C) πrθ /360°
(D) πrθ /180°

Answer 1

Solution:

Option D is correct.



Sector of a circle:

The region enclosed by two radii and the corresponding arc of a circle is called a sector of a circle.


The Arc Corresponding to a sector is called the arc of the sector.


The length of the arc of a sector of a circle of radius r and Central angle θ is equal to :

πrθ/180°

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