求助8年级数学题

2011-6-10 20:08| 发布者: richiz | 查看: 1261| 原文链接

a circle that has its center at the origin passes through(0,-7). which of the following points does it also pass through?
(a) (-7,-7)
(b) (6,根号13)
(c) (7,-7)
(d) (3,4)
(e) (5,-4)

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