freeCodeCamp/guide/chinese/mathematics/area-of-a-ellipse/index.md

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---
title: Area of an Ellipse
localeTitle: 椭圆的面积
---
## 椭圆的面积
椭圆是由连续曲线和两个焦点定义的2D形状。从焦点到曲线上任意点的两个距离之和是恒定的。
#### 术语
* 焦点或焦点 - 这些点与椭圆的中心等距
* 主轴 - 绘制的线将椭圆切成两半并穿过两个焦点
* 短轴 - 绘制的线将椭圆切成两半并在两个焦点之间运行
![](https://jwolfgang.info/wp-content/uploads/2017/10/area-of-ellipse2.png)
##### 式
椭圆面积= (π) 1/2长轴1/2短轴
##### 例
给定长轴= 2英寸短轴=椭圆的查找区域中的7。
面积=在\* 1/2 \* 7 \*π= 11 2 1/2×2
#### 更多信息:
* [维基百科](https://en.wikipedia.org/wiki/Ellipse)
* [数学很有趣](https://www.mathsisfun.com/geometry/ellipse.html)