An arc of a circle subtends an angle of 60o at ... - WAEC Mathematics 2009 Question
An arc of a circle subtends an angle of 60o at the centre. If the radius of the circle is 3cm, find , in terms of \(\pi\), the length of the arc
A
\(\pi\)cm
B
2\(\pi\)cm
C
3\(\pi\)cm
D
6\(\pi\)cm
correct option: a
Length of arc = \(\frac{\theta}{360} \times 2\pi r\)
= \(\frac{60}{360} \times 2\pi \times 3cm\)
= \(\pi\)cm
= \(\frac{60}{360} \times 2\pi \times 3cm\)
= \(\pi\)cm
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