1.CP、BP分别平分∠DCA、∠ABD,试说明:∠P=1/2(∠A+∠D)2.△ABC中,AB=AC,AC边上的中线BD把△ABC的周长分成12cm和15cm两部分,求这个三角形各边的长3.在△ABC中,∠A=∠ACB,CD是∠ACB的角平分线,CE⊥AB于E
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![1.CP、BP分别平分∠DCA、∠ABD,试说明:∠P=1/2(∠A+∠D)2.△ABC中,AB=AC,AC边上的中线BD把△ABC的周长分成12cm和15cm两部分,求这个三角形各边的长3.在△ABC中,∠A=∠ACB,CD是∠ACB的角平分线,CE⊥AB于E](/uploads/image/z/1005777-9-7.jpg?t=1.CP%E3%80%81BP%E5%88%86%E5%88%AB%E5%B9%B3%E5%88%86%E2%88%A0DCA%E3%80%81%E2%88%A0ABD%2C%E8%AF%95%E8%AF%B4%E6%98%8E%EF%BC%9A%E2%88%A0P%3D1%2F2%EF%BC%88%E2%88%A0A%2B%E2%88%A0D%EF%BC%892.%E2%96%B3ABC%E4%B8%AD%2CAB%3DAC%2CAC%E8%BE%B9%E4%B8%8A%E7%9A%84%E4%B8%AD%E7%BA%BFBD%E6%8A%8A%E2%96%B3ABC%E7%9A%84%E5%91%A8%E9%95%BF%E5%88%86%E6%88%9012cm%E5%92%8C15cm%E4%B8%A4%E9%83%A8%E5%88%86%2C%E6%B1%82%E8%BF%99%E4%B8%AA%E4%B8%89%E8%A7%92%E5%BD%A2%E5%90%84%E8%BE%B9%E7%9A%84%E9%95%BF3.%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2C%E2%88%A0A%3D%E2%88%A0ACB%2CCD%E6%98%AF%E2%88%A0ACB%E7%9A%84%E8%A7%92%E5%B9%B3%E5%88%86%E7%BA%BF%2CCE%E2%8A%A5AB%E4%BA%8EE)
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