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


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