Perimeter of a Circular Segment

Perimeter of a Circular Segment

Secondary 3

The diagram shows a sector \(OABC\) of a circle, centre \(O\).
Triangle \(OCD\) is isosceles with \(OC=OD=9\) cm and \(\angle COD=1.352\) radians.
Find the perimeter of the shaded region \(ABC\).

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Answer:\(30.1\text{ cm}\)

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