| 圆的切线的作法 |
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| 引用本文： | 孟令江.圆的切线的作法[J].唐山师范学院学报,2000(2). |
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| 作者姓名： | 孟令江 |
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| 作者单位： | 唐山师专数学系 河北 |
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| 摘 要： | 本文用射影几何的观点,只用直尺作出了圆的过已知点的切线,并给出了简要说明。
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| 关 键 词： | 切线 共轭 极 极线 |
How to Draw the Tangents of a Rotundity |
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| Meng Ling-Jiang.How to Draw the Tangents of a Rotundity[J].Journal of Tangshan Teachers College,2000(2). |
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| Authors: | Meng Ling-Jiang |
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| Institution: | Maths Department of Tangshan Teachers College Hebei Tangshan |
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| Abstract: | From the points of projective geometry, the author illustrates how to draw the tangent from a given point on a rotundity,and also gives some explanations. |
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| Keywords: | tangent conjugate magnitude polar |
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