Composite Figures, SM-Bank 001

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Find the perimeter of the figure below correct to one decimal place. (2 marks)

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\(88.3\ \text{cm (1 d.p.)}\)

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\(\text{Perimeter}\)	\(=3\ \text{straight sides}+\text{semi-circle}\)
	\(=2\times 21 +18+\Bigg(\dfrac{\pi \times d}{2}\Bigg)\)
	\(=60+\Bigg(\dfrac{\pi \times 18}{2}\Bigg)\)
	\(=88.2743\dots\)
	\(=88.3\ \text{cm (1 d.p.)}\)