三角形ABC,a=13,b=14,c=15,求S三角形ABC
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![三角形ABC,a=13,b=14,c=15,求S三角形ABC](/uploads/image/z/10391566-22-6.jpg?t=%E4%B8%89%E8%A7%92%E5%BD%A2ABC%2Ca%3D13%2Cb%3D14%2Cc%3D15%2C%E6%B1%82S%E4%B8%89%E8%A7%92%E5%BD%A2ABC)
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