1.已知,在三角形ABC中,角ACB=90度,AC=BC,P是三角形ABC内一点,且PA=3,PB=1,PC=2,求角BPC的度数2.在三角形ABC中,AB=AC,E是AB中点,延长AB到D,使BD=BA,求证:CD=2CE麻烦尽量将过程写详细点儿
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![1.已知,在三角形ABC中,角ACB=90度,AC=BC,P是三角形ABC内一点,且PA=3,PB=1,PC=2,求角BPC的度数2.在三角形ABC中,AB=AC,E是AB中点,延长AB到D,使BD=BA,求证:CD=2CE麻烦尽量将过程写详细点儿](/uploads/image/z/3141265-49-5.jpg?t=1.%E5%B7%B2%E7%9F%A5%2C%E5%9C%A8%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2C%E8%A7%92ACB%3D90%E5%BA%A6%2CAC%3DBC%2CP%E6%98%AF%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E5%86%85%E4%B8%80%E7%82%B9%2C%E4%B8%94PA%3D3%2CPB%3D1%2CPC%3D2%2C%E6%B1%82%E8%A7%92BPC%E7%9A%84%E5%BA%A6%E6%95%B02.%E5%9C%A8%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2CAB%3DAC%2CE%E6%98%AFAB%E4%B8%AD%E7%82%B9%2C%E5%BB%B6%E9%95%BFAB%E5%88%B0D%2C%E4%BD%BFBD%3DBA%2C%E6%B1%82%E8%AF%81%3ACD%3D2CE%E9%BA%BB%E7%83%A6%E5%B0%BD%E9%87%8F%E5%B0%86%E8%BF%87%E7%A8%8B%E5%86%99%E8%AF%A6%E7%BB%86%E7%82%B9%E5%84%BF)
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