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@@ -51,10 +51,10 @@ C = 2πr;
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可得:
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**弧度 = 角度xπ/180**
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**角度 = 弧度x180/π**
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公式 | 例子
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----------------------|---------------------
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**弧度 = 角度xπ/180** | 2π = 360 x π / 180
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**角度 = 弧度x180/π** | 360 = 2π x 180 / π
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## 四.一些细节问题
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由于默认屏幕坐标系和常见数学坐标系的小差别([坐标系问题点这里](https://github.com/GcsSloop/AndroidNote/blob/master/CustomView/Base/%5B1%5DCoordinateSystem.md)),所以在角上必然也会存在一些区别,例如:
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