Mathematics

Mathematics

Problem

Which of the following expressions gives the area of a sector of radius rr subtending an angle θ\theta (in degrees) at the centre of a circle? a) θ180×πr2\dfrac{\theta}{180}\times \pi r^2 b) θ2π×r2\dfrac{\theta}{2\pi}\times r^2 c) θ360×πr2\dfrac{\theta}{360}\times \pi r^2 d) 360θ×πr2\dfrac{360}{\theta}\times \pi r^2

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