Answer and Explanation
Your Answer is
Correct Answer is A
Explanation
Easy to know: the center of this circle is (3, 3) and the radius is 3, then according to the equation of the circle: (xa)2+(yb)2 =r2 The answer is A.
57. In the standard（x, y）coordinate plane below, the vertices of the square have coordinates (0,0), (6,0), (6,6) and (0,6). Which of the following is an equation of the circle that is inscribed in the square ?
