Mathematics

Problem

Which of the following expresses the area

A

of a sector of a circle with radius

r

and central angle

\theta

(in degrees)? a)

A = \dfrac{\theta}{360}\,(2\pi r^{2})

A = \dfrac{\theta}{180}\,\pi r^{2}

A = \dfrac{\theta}{360}\,\pi r^{2}

A = \dfrac{\theta}{2}\, r^{2}