A circle is inscribed in a square whose length of the diagonal is 12 $$\sqrt{2}$$ cm. An equilateral triangle is inscribed in that circle. The length of the side of the triangle is

A

4 $$\sqrt{3}$$ cm

B

8 $$\sqrt{5}$$ cm

C

6 $$\sqrt{3}$$ cm

D

11 $$\sqrt{3}$$ cm