如图,圆o的半径为5厘米,ab是圆o的弦,c是ab 延长线上一点,且角oca=30度,oc=8厘米如图,圆o的半径为5厘米,ab是圆o的弦,c是ab延长线上一点,且角oca=30度,oc=8厘米,求ab的长
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![如图,圆o的半径为5厘米,ab是圆o的弦,c是ab 延长线上一点,且角oca=30度,oc=8厘米如图,圆o的半径为5厘米,ab是圆o的弦,c是ab延长线上一点,且角oca=30度,oc=8厘米,求ab的长](/uploads/image/z/13896681-33-1.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9C%86o%E7%9A%84%E5%8D%8A%E5%BE%84%E4%B8%BA5%E5%8E%98%E7%B1%B3%2Cab%E6%98%AF%E5%9C%86o%E7%9A%84%E5%BC%A6%2Cc%E6%98%AFab+%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%B8%8A%E4%B8%80%E7%82%B9%2C%E4%B8%94%E8%A7%92oca%3D30%E5%BA%A6%2Coc%3D8%E5%8E%98%E7%B1%B3%E5%A6%82%E5%9B%BE%2C%E5%9C%86o%E7%9A%84%E5%8D%8A%E5%BE%84%E4%B8%BA5%E5%8E%98%E7%B1%B3%2Cab%E6%98%AF%E5%9C%86o%E7%9A%84%E5%BC%A6%2Cc%E6%98%AFab%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%B8%8A%E4%B8%80%E7%82%B9%2C%E4%B8%94%E8%A7%92oca%3D30%E5%BA%A6%2Coc%3D8%E5%8E%98%E7%B1%B3%2C%E6%B1%82ab%E7%9A%84%E9%95%BF)
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