The diagram shows an arc MN of a circle, centre O, with 10cm. If The diagram shows an arc MN of a circle, centre O, with 10cm. If o. calculate the length of the arc, correct to three significant figures. [Take (pi = frac{22}{7})] A. 6.28cm B. 12.6cm C. 22.6cm D. 62.8cm Correct Answer: Option B Explanation Length of arc = (frac{theta}{360 times 2 pi r}) = (frac{72}{360} times 2 times frac{22}{7} times 10)cm = 12.57 = 12.6cm(3 s.f) `, props: [‘comment’], data() { return {} }, methods: {} }) {{ reply.posted_by.display_name }}:   {{ reply.created_at }}

The diagram shows an arc MN of a circle, centre O, with 10cm. If o. calculate the length of the arc, correct to three significant figures. [Take (pi = frac{22}{7})]
  • A.
    6.28cm
  • B.
    12.6cm
  • C.
    22.6cm
  • D.
    62.8cm
Correct Answer: Option B
Explanation

Length of arc = (frac{theta}{360 times 2 pi r})
= (frac{72}{360} times 2 times frac{22}{7} times 10)cm
= 12.57
= 12.6cm(3 s.f)

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