Composite Figures, SM-Bank 005

Find the perimeter of the figure below correct to two decimal places. (2 marks)

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\(585.39\ \text{mm (2 d.p.)}\)

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\(\text{Perimeter}\)	\(=2\ \text{straight sides}+\dfrac{280}{360}\times \ \text{circumference}\)
	\(=2\times 85+\Bigg(\dfrac{7}{9}\times 2\pi r\Bigg)\)
	\(=170+\Bigg(\dfrac{7}{9}\times 2\pi \times 9.8\Bigg)\)
	\(=585.3883\dots\)
	\(=585.39\ \text{mm (2 d.p.)}\)