AB是圆o的直径,弦DE垂直平分半径OA,C为垂足,弦DF与半径OB交点P,连接EF,EO.如果DE等于2倍根号3,角DPA为45度.(1)求圆O 的半径?(2)求图中阴影部分的面积
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![AB是圆o的直径,弦DE垂直平分半径OA,C为垂足,弦DF与半径OB交点P,连接EF,EO.如果DE等于2倍根号3,角DPA为45度.(1)求圆O 的半径?(2)求图中阴影部分的面积](/uploads/image/z/5283379-19-9.jpg?t=AB%E6%98%AF%E5%9C%86o%E7%9A%84%E7%9B%B4%E5%BE%84%2C%E5%BC%A6DE%E5%9E%82%E7%9B%B4%E5%B9%B3%E5%88%86%E5%8D%8A%E5%BE%84OA%2CC%E4%B8%BA%E5%9E%82%E8%B6%B3%2C%E5%BC%A6DF%E4%B8%8E%E5%8D%8A%E5%BE%84OB%E4%BA%A4%E7%82%B9P%2C%E8%BF%9E%E6%8E%A5EF%2CEO.%E5%A6%82%E6%9E%9CDE%E7%AD%89%E4%BA%8E2%E5%80%8D%E6%A0%B9%E5%8F%B73%2C%E8%A7%92DPA%E4%B8%BA45%E5%BA%A6.%EF%BC%881%EF%BC%89%E6%B1%82%E5%9C%86O+%E7%9A%84%E5%8D%8A%E5%BE%84%3F%EF%BC%882%EF%BC%89%E6%B1%82%E5%9B%BE%E4%B8%AD%E9%98%B4%E5%BD%B1%E9%83%A8%E5%88%86%E7%9A%84%E9%9D%A2%E7%A7%AF)
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