Prep上的一道数学题请教

A certain circular area has its center at point P and has radius 4, and points X and Y lie in the same plain as the circular area. Does pint Y lies outside the circular area?

1 The distance between point P and point X is 4.5

2 The distance between point X and point Y is 9

我选E，答案是C，我觉得两个条件和起来Y还是可能在圆内或者圆外的

我觉得两个条件加起来可以看出Y必定在圆外……

恩，是的，我看走眼了