# Find the length of the sides of an equilateral triangle inscribed in a circle of radius $6$cm.

An equilateral triangle ABC is inscribed in a circle of radius $6$ cm. O is the centre of the circle. Find its sides.

What I did:- I joined OB and OA and by applying trigonometry in triangle OAB, tried finding sides of equilateral triangle. But realized it wasn't a right angled triangle. How to find the sides?