When a triangle similar to an equilateral triangle of side 6 cm is constructed at a scale of 1 : 3, then the sides of the new triangle is .
What is the inradius of an equilateral triangle, the length of whose sides is 2√3 cm?
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