waecmaths question:
An arc of a circle subtends an angle of 60o at the centre. If the radius of the circle 3cm, find in terms of π, the length of the arc
Option A:
π cm
Option B:
2π cm
Option C:
3π cm
Option D:
6π cm
waecmaths solution:
$\begin{align} & length\text{ }of\text{ }the\text{ }arc=\frac{\theta }{360}\times 2\pi r \\ & l=\frac{{{60}^{\circ }}}{{{360}^{\circ }}}\times 2\times \pi \times 3=\pi cm \\\end{align}$
maths year:
maths topics: