freeCodeCamp/guide/chinese/mathematics/complementary-angles/index.md

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---
title: Complementary Angles
localeTitle: 互补角度
---
# 互补角度
## 定义
两个角度当加在一起时具有90°的总和称为互补角度。
![](https://raw.githubusercontent.com/pranabendra/articles/master/Complementary-angles/comp1.png)
互补角度不必彼此相邻只要总长度为90°即可。
### 例如
在上图中,图`a.`和`b.`表明互补角是_相邻的_ ,而在`c.`和`d.` 互补角度_不相邻_ 。
## 更多信息:
[互补角度](https://www.mathsisfun.com/geometry/complementary-angles.html)