无穷远元素
无穷远元素-
无穷远元素在初等几何中的应用
The Application of Infinitive Far Element In Elementary Geometry
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无穷远元素的应用
The Application of Infinitive Far Element
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交比和无穷远元素是射影几何中的两个重要概念，它们是探讨图形射影性质的主要工具。
Cross ratio and element at infinity are two important concepts with projective geometry and primary tools in considerate projective property of figures .