WAEC - Mathematics (2006 - No. 44)

The diagram shows an arc MN of a circle, centre O, with 10cm. If < MON = 72^o. calculate the length of the arc, correct to three significant figures. [Take \(\pi = \frac{22}{7}\)]

6.28cm

12.6cm

22.6cm

62.8cm

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)

WAEC - Mathematics (2006 - No. 44)

Explanation

Comments (0)