Question

Find in terms of π, the length of the arc that subtends an angle of 30° at the centre of a circle of radius 4 cm.

Answer 1

Length of arc =`theta/360°`× 2𝜋𝑟

Radius = r = 4 cm

𝜃 = angle subtended at centre = 30°

Arc length =`30^@/360^@`× 2 × (7)

=`(2pi)/3`cm