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题库 / Prep2007E2-DS-167
A certain circular area has its center at point P and has radius 4, and points X and Y lie in the same plane as the circular area. Does point Y lie 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.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
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条件1肯定不充分因为不知道y的情况。条件2，如果xy距离是9,px的距离是4.5，根据三角形的性质，py的长度一定大于三角形其他两边的差，也就是9-4.5=4.5大于圆的半径，所以y在圆外。
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