Question

In a circle of radius 3 centimetres, what is the length of an arc of central angle 30°?

Answer 1

Radius (r) of the circle = 3 cm

Perimeter of the circle = 2πr

= (2 × 3.141 × 3) cm

= 18.846 cm

Central angle made by the given arc is 30°, which is of 360°.

∴ Length of the arc = of the perimeter of the circle

=

_{= 1.5705 cm}