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File:Vector included angle. png.png

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中文：两向量之夹角
Date
Source Microsoft Office Powepoint
Author Zhuiyi302
Public domain This image of simple geometry is ineligible for copyright and therefore in the public domain, because it consists entirely of information that is common property and contains no original authorship.
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current17:28, 18 April 2018Thumbnail for version as of 17:28, 18 April 2018960 × 720 (9 KB)Zhuiyi302 (talk | contribs){{subst:上传由zh.wp UW添加的标记}} {{Information |Description = {{zh|两向量之夹角}} |Source = Microsoft Office Powepoint |Date = 2018-04-18 |Author = Zhuiyi302 }}

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