扇形(Circular sector)指圆上被两条半径和半径所截之一段弧所围成的图形。因形状如一把扇子而得名。故圆形是一种扇形。
此条目需要补充更多来源。 (2024年8月3日) |
弧长
- (弧度制)
- (角度制)
面积
- (弧度制)
- (角度制)
扇形的面积∝弧长:
扇形面积的积分形式:
- (弧度制)
周长
扇形的周长由弧长和两个半径组成:
- (弧度制)
弦长
- (弧度制)
附加性质
参见
参考来源
- Gerard, L. J. V. The Elements of Geometry, in Eight Books; or, First Step in Applied Logic, London, Longman's Green, Reader & Dyer, 1874. p. 285
外部链接
- Definition and properties of a circle sector with interactive animation
- 埃里克·韦斯坦因. Circular sector. MathWorld.
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