The radius of a circle is 30 cm. Find the length of an arc of this circle, if the length of the chord of the arc is 30 cm.
Let AB be chord and O be the centre if the circle.
Here AO = BO = AB = 30 cm
∴ ΔAOB is an equilateral triangle.
Given radius = 30 cm
And θ = 60°
We know that 180° = π rad ⇒ 1° = π/ 180 rad
We know that
= 10π cm