If an equilateral triangle is inscribed in a circle, then the ratio of the radius of the circle to that of the side of the triangle is -
1
3
1/√3
√3
2
9r24 + x24 = x2
rx = 1√3
An equilateral triangle of side 9 cm is inscribed in a circle. The radius of the circle is
(a) 3 cm
(b) 3√2 cm
(c) 3√3 cm
(d) 6 cm