In the diagram, O is the centre of the circle of radius 18cm. If < zxy = 70\(^o\), calculate the length of arc ZY. [Take \(\pi = \frac{22}{7}\)]

  • A 11cm
  • B 22 cm
  • C 44 cm
  • D 80 cm
waec 2019mathematics

The correct answer is C. 44 cm

Z\({O}\)T = 2 x 70\(^o\) 140\(^o\)

Length = \(\frac{\theta}{360}\) x 2\(\pi\)r

\(\frac{140^o}{360} \times 2 \times \frac{22}{7}\) x 18

= 44cm

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