一道初中竞赛题在△ABC中年,AB=15,AC=3,BC边上的高AD=12,能完全覆盖半径R的最小值为______________.7.5
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![一道初中竞赛题在△ABC中年,AB=15,AC=3,BC边上的高AD=12,能完全覆盖半径R的最小值为______________.7.5](/uploads/image/z/7123755-3-5.jpg?t=%E4%B8%80%E9%81%93%E5%88%9D%E4%B8%AD%E7%AB%9E%E8%B5%9B%E9%A2%98%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%E5%B9%B4%2CAB%3D15%2CAC%3D3%2CBC%E8%BE%B9%E4%B8%8A%E7%9A%84%E9%AB%98AD%3D12%2C%E8%83%BD%E5%AE%8C%E5%85%A8%E8%A6%86%E7%9B%96%E5%8D%8A%E5%BE%84R%E7%9A%84%E6%9C%80%E5%B0%8F%E5%80%BC%E4%B8%BA______________.7.5)
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