A square is inscribed in a circle of diameter 12 millimeters. What is the area of the shaded region? Recall that in a 45 – 45 – 90 triangle, if the legs each measure x units, then the hypotenuse measures the square root of x units. A (72π – 144) mm2 B (72π – 72) mm2 - C (288π – 288) mm2 - D (288π – 144) mm2