如图AB小于BC,AD=DC,BD平分角ABC,求证角A+角C=180度这是图,还有一题已知等边三角形ABC和等边三角形BDE,且点A在DE延长线上,求证BD+DC=AD
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![如图AB小于BC,AD=DC,BD平分角ABC,求证角A+角C=180度这是图,还有一题已知等边三角形ABC和等边三角形BDE,且点A在DE延长线上,求证BD+DC=AD](/uploads/image/z/2560678-70-8.jpg?t=%E5%A6%82%E5%9B%BEAB%E5%B0%8F%E4%BA%8EBC%2CAD%3DDC%2CBD%E5%B9%B3%E5%88%86%E8%A7%92ABC%2C%E6%B1%82%E8%AF%81%E8%A7%92A%2B%E8%A7%92C%3D180%E5%BA%A6%E8%BF%99%E6%98%AF%E5%9B%BE%2C%E8%BF%98%E6%9C%89%E4%B8%80%E9%A2%98%E5%B7%B2%E7%9F%A5%E7%AD%89%E8%BE%B9%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E5%92%8C%E7%AD%89%E8%BE%B9%E4%B8%89%E8%A7%92%E5%BD%A2BDE%2C%E4%B8%94%E7%82%B9A%E5%9C%A8DE%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%B8%8A%2C%E6%B1%82%E8%AF%81BD%2BDC%3DAD)
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