1.圆的半径为240mm,求这个圆上长为500mm的弧所对的圆心角是多少度?2.直径为20m的轮子以45rad/s(弧度/秒)的速度旋转,求轮周上一点经过5s所转过的弧长.3.航海罗盘的圆周被分成32等份,把每一份所
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![1.圆的半径为240mm,求这个圆上长为500mm的弧所对的圆心角是多少度?2.直径为20m的轮子以45rad/s(弧度/秒)的速度旋转,求轮周上一点经过5s所转过的弧长.3.航海罗盘的圆周被分成32等份,把每一份所](/uploads/image/z/1295739-27-9.jpg?t=1.%E5%9C%86%E7%9A%84%E5%8D%8A%E5%BE%84%E4%B8%BA240mm%2C%E6%B1%82%E8%BF%99%E4%B8%AA%E5%9C%86%E4%B8%8A%E9%95%BF%E4%B8%BA500mm%E7%9A%84%E5%BC%A7%E6%89%80%E5%AF%B9%E7%9A%84%E5%9C%86%E5%BF%83%E8%A7%92%E6%98%AF%E5%A4%9A%E5%B0%91%E5%BA%A6%3F2.%E7%9B%B4%E5%BE%84%E4%B8%BA20m%E7%9A%84%E8%BD%AE%E5%AD%90%E4%BB%A545rad%2Fs%28%E5%BC%A7%E5%BA%A6%2F%E7%A7%92%29%E7%9A%84%E9%80%9F%E5%BA%A6%E6%97%8B%E8%BD%AC%2C%E6%B1%82%E8%BD%AE%E5%91%A8%E4%B8%8A%E4%B8%80%E7%82%B9%E7%BB%8F%E8%BF%875s%E6%89%80%E8%BD%AC%E8%BF%87%E7%9A%84%E5%BC%A7%E9%95%BF.3.%E8%88%AA%E6%B5%B7%E7%BD%97%E7%9B%98%E7%9A%84%E5%9C%86%E5%91%A8%E8%A2%AB%E5%88%86%E6%88%9032%E7%AD%89%E4%BB%BD%2C%E6%8A%8A%E6%AF%8F%E4%B8%80%E4%BB%BD%E6%89%80)
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