GRE考试

【单选题】If
A、is the point (-4, 1) and
B、is the point (2, 1), what is the area of the circle which hasA
B、as a diameter
A、3π
B、6π
C、9π
D、12π
E、36π
网考网参考答案：C
网考网解析：
Use TACTIC 1, Chapter 10. Draw a diagram. Since the distance between (-4,1) and (2,1) is 6, the diameter of the circle is 6 and the radius is 3. Then the area is re(3) 2 = 9π. [*] document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>