The area of a circle inscribed in an equilateral triangle of side aaa is:
pia2/12\\pi a^2 / 12pia2/12
pia2/6\\pi a^2 / 6pia2/6
pia2/3\\pi a^2 / 3pia2/3
pia2/4\\pi a^2 / 4pia2/4