边

Multi tool use

關於中文姓氏,請見「
邊姓」。
图为三角形的三边AB、BC和CA,位于三角形的每两个顶点之间。
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图为一个正方形,它有4条边。
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图为一个正方体,它是多面体的一种,每个边都与多面体中的两个面相接。
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边是一个几何图形两个相邻顶点之间线段,[1]边长指這線段的長度。假如连接两个端点的是一段曲线,数学上稱為弧。
在图论中,边(Edge,Line)是两个事物间某种特定关系的抽象化。两个事物间有联系,则这两个事物代表的顶点间就连有边,用一根直线或曲线表示。
在某些教科书,边长也用于表示在一个封闭的平面几何图形中的所有连接相邻断点的线段的长度的总和,参见周长。
参见
参考文献
^ Ziegler, Günter M., Lectures on Polytopes, Graduate Texts in Mathematics 152, Springer, Definition 2.1, p. 51, 1995 .
外部链接
- Olshevsky, George, Edge at Glossary for Hyperspace.
- 埃里克·韦斯坦因. 多边形的边. MathWorld.
- 埃里克·韦斯坦因. 多边形的边. MathWorld.
几何学术语
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點 |
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直線和曲線
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- 線段
- 射線
- 直線
- 切線
- 法线
- 曲線
- 圓錐曲線
- 双曲线
- 抛物线
- 螺線
- 邊
- 周界
- 弦
- 弧
- 垂直平分線
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平面圖形 |
- 圓
- 橢圓
- 扇形
- 弓形
- 多邊形
- 三角形
- 四邊形
- 五边形
- 六边形
- 多边形
- 梯形
- 平行四邊形
- 菱形
- 矩形
- 正方形
- 鷂形
- 卵形线
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立體圖形 |
- 多面體
- 正多面體
- 四面体
- 長方體
- 立方體
- 平行六面体
- 棱柱
- 反棱柱
- 棱錐
- 圓柱體
- 圓錐
- 圓台
- 橢球
- 球體
- 球缺
- 球冠
- 球台
- 二次曲面
- 抛物面
- 雙曲面
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圖形關係 |
- 相似
- 全等
- 对称
- 平行
- 垂直
- 相交
- 相切
- 镜像
- 旋转
- 反演
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三角形關係 |
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量 |
- 距離
- 長度
- 周长
- 弧长
- 高度
- 面積
- 表面積
- 體積
- 容積
- 角度
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作圖 |
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理論 |
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