shows a sector of a circle, centre O, containing an angle θ^∘. Prove that:(i) Perimeter of the sh...

shows a sector of a circle, centre O, containing an angle θ^∘. Prove that:(i) Perimeter of the shaded region is r(tanθ+θ+πθ/180-1)
(ii) Area of the shaded region is r^2/2(tanθ-πθ/180)

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