| 变化中的不变量 --谈立体几何折叠问题的解题思路 |
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| 引用本文： | 李平珠.变化中的不变量 --谈立体几何折叠问题的解题思路[J].甘肃联合大学学报(自然科学版),2005,19(4):80-82. |
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| 作者姓名： | 李平珠 |
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| 作者单位： | 兰化中小学总校第二中学,甘肃,兰州,730060 |
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| 摘 要： | 从立体几何自身的线面关系问题;与空间向量结合的综合问题;与解析几何结合的综合问题;与最值结合的综合问题四个方面探求立体几何折叠问题的解题思路.结合具体题例,总结了其解法的关键是抓住变化中的不变量.
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| 关 键 词： | 变化 不变量 立体几何 折叠问题 解题方法 |
| 文章编号： | 1672-691X（2005）04-0081-03 |
| 收稿时间： | 2005-06-16 |
| 修稿时间： | 2005年6月16日 |
The Unvariable among Changes --Talking about the Thinking in Solving a Problem about Folding among Solid Geometry |
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| LI Ping-zhu.The Unvariable among Changes --Talking about the Thinking in Solving a Problem about Folding among Solid Geometry[J].Journal of Gansu Lianhe University :Natural Sciences,2005,19(4):80-82. |
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| Authors: | LI Ping-zhu |
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| Abstract: | The article tries to probe the thinking in solving a problem about folding among solid geometry from the aspect about the line and face for solid geometry itself, the synthetic field about the link for vector of space and solid geometry,the side about the combination for analytic geometry and solid geometry ; and the synthesis about the most value and solid geometry. Furthermore, with some concrete examples,the article summes up the key about the method in solving mathematics that is to grasp the unvariable among changing. |
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| Keywords: | changingi unvariable solid geometry folding question the method of solving a problem |
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