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40楼#
发布于：2015-12-04 21:36
图片：垂径定理；勾股定理；圆周角定理.png  |
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![21天勇士[春]](https://bbs.jd100.com/attachment/medal/557cbed59379b9b.png "21天勇士[春]"){kind=small}
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41楼#
发布于：2015-12-05 08:08
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42楼#
发布于：2015-12-11 18:50
图片：圆周角、勾股定理.png |
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43楼#
发布于：2015-12-20 15:14
图片：相似三角形.png |
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