Just for viewing purposes. You can store and calculate this formula only inside the application.
area and circumscribed circle of any triangle
s = (a + b + c) / 2 /* "s" means the half of the periphery of any triangle with its sides a, b and c and with the area "A". */ A = SQRT( s*(s - a)*(s - b)*(s - c)) R = a * b * c / (4 * A) /* "R" means the radius of the circumscribed circle. */