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什么是起始角和终止角
更新时间: 2020-09-17 00:00:00  

引入一个角度的坐标,规定角度0的位置和角度增大的方向是逆时针方向或顺时针方向,这样能确定每一条射线所对应的角度,就有一个或多个对应的角度与之对应(相差360度的整数倍)。当一个过程发生时起始位置的射线对应的角度就称为起始角;过程结束时位置的射线所对应的角度就是终止角。

关键词: 什么 起始 终止

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