In the circle above, with centre O and radius 7 cm. Find the length of the arc AB, when < AOB = 57°.
- 5.32 cm
- 4.39 cm
- 7.33 cm
-
6.97 cm
The correct answer is: D
Explanation
Length of arc = \(\frac{\theta}{360°} \times 2 \pi r\)
= \(\frac{57}{360} \times 2 \times \frac{22}{7} \times 7\)
= 6.97 cm
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