已知一个三棱锥的三视图.其俯视图为等腰直角三角形,则该直角三角形的外接球体积
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![已知一个三棱锥的三视图.其俯视图为等腰直角三角形,则该直角三角形的外接球体积](/uploads/image/z/10395516-12-6.jpg?t=%E5%B7%B2%E7%9F%A5%E4%B8%80%E4%B8%AA%E4%B8%89%E6%A3%B1%E9%94%A5%E7%9A%84%E4%B8%89%E8%A7%86%E5%9B%BE.%E5%85%B6%E4%BF%AF%E8%A7%86%E5%9B%BE%E4%B8%BA%E7%AD%89%E8%85%B0%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2%2C%E5%88%99%E8%AF%A5%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E5%A4%96%E6%8E%A5%E7%90%83%E4%BD%93%E7%A7%AF)
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