In the diagram, AD and BC are arcs of circles with centre O, such that OA =
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In the diagram, AD and BC are arcs of circles with centre O, such that OA = OD = r cm, AB = DC = 8 cm and ∠BOC = θ radians.
a. Given that the area of the shaded region is 48 cm2, show that r = 6/θ - 4.
b. Given also that r = 10θ, calculate the perimeter of the shaded region.
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Related Book For
Pearson Edexcel A Level Mathematics Pure Mathematics Year 2
ISBN: 9781292183404
1st Edition
Authors: Greg Attwood, Jack Barraclough, Ian Bettison, David Goldberg, Alistair Macpherson, Joe Petran
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