An angle of is drawn at the centre of a circle of radius

MATHEMATICS · Single correct · CBSE · Mathematics · Trigonometric Functions · Trigonometric Functions

Problem

An angle of

120^{\circ}

is drawn at the centre of a circle of radius

r

. The length of the intercepted arc is (a)

\dfrac{\pi r}{3}

(b)

\dfrac{4\pi r}{3}

(c)

\dfrac{2\pi r}{3}

(d)

\dfrac{2 r}{3}