△ABC中,BC=a 1)若AD1=1/3AB,AE1=1/3AC,则D1E1=?(2)若D1D2=1/3D1B,E1E2=1/3E1C,则D2E2=?(3)若D2D3=1/3D2
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![△ABC中,BC=a 1)若AD1=1/3AB,AE1=1/3AC,则D1E1=?(2)若D1D2=1/3D1B,E1E2=1/3E1C,则D2E2=?(3)若D2D3=1/3D2](/uploads/image/z/3976918-70-8.jpg?t=%E2%96%B3ABC%E4%B8%AD%2CBC%3Da+1%29%E8%8B%A5AD1%3D1%2F3AB%2CAE1%3D1%2F3AC%2C%E5%88%99D1E1%3D%3F%282%29%E8%8B%A5D1D2%3D1%2F3D1B%2CE1E2%3D1%2F3E1C%2C%E5%88%99D2E2%3D%3F%283%29%E8%8B%A5D2D3%3D1%2F3D2)
△ABC中,BC=a 1)若AD1=1/3AB,AE1=1/3AC,则D1E1=?(2)若D1D2=1/3D1B,E1E2=1/3E1C,则D2E2=?(3)若D2D3=1/3D2
△ABC中,BC=a 1)若AD1=1/3AB,AE1=1/3AC,则D1E1=?(2)若D1D2=1/3D1B,E1E2=1/3E1C,则D2E2=?(3)若D2D3=1/3D2
△ABC中,BC=a 1)若AD1=1/3AB,AE1=1/3AC,则D1E1=?(2)若D1D2=1/3D1B,E1E2=1/3E1C,则D2E2=?(3)若D2D3=1/3D2
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