[2 marks for (a) and 3 marks for (b)]{Answers given: 116 cm and 364.42 cm (correct to 2 decimal places)]
43 x 2 = 86 cm
86 x 2 = 172 cm
28 x 2 = 56 cm
172 - 56 = 116 cm
a) The length of SR is 116 cm.
86 - 56 = 30 cm
pi x 30 = 94.247 cm
2 x pi x 43 = 20.177 cm
94.247 + 20.177 = 364.42 cm (2 dp)
The perimeter is 364.42 cm.
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