已知如图三角形abc中∠abc∠acb的平分线bo,co交与点o,过点o画ef平行于bc交ab于点e,ac与点f(1)找出图中一对相等的线段,并说明理由(2)若∠abc=60°,∠acb=80°,求∠a、∠boc的度数(3)根据(2)的
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![已知如图三角形abc中∠abc∠acb的平分线bo,co交与点o,过点o画ef平行于bc交ab于点e,ac与点f(1)找出图中一对相等的线段,并说明理由(2)若∠abc=60°,∠acb=80°,求∠a、∠boc的度数(3)根据(2)的](/uploads/image/z/5203656-0-6.jpg?t=%E5%B7%B2%E7%9F%A5%E5%A6%82%E5%9B%BE%E4%B8%89%E8%A7%92%E5%BD%A2abc%E4%B8%AD%E2%88%A0abc%E2%88%A0acb%E7%9A%84%E5%B9%B3%E5%88%86%E7%BA%BFbo%2Cco%E4%BA%A4%E4%B8%8E%E7%82%B9o%2C%E8%BF%87%E7%82%B9o%E7%94%BBef%E5%B9%B3%E8%A1%8C%E4%BA%8Ebc%E4%BA%A4ab%E4%BA%8E%E7%82%B9e%2Cac%E4%B8%8E%E7%82%B9f%EF%BC%881%EF%BC%89%E6%89%BE%E5%87%BA%E5%9B%BE%E4%B8%AD%E4%B8%80%E5%AF%B9%E7%9B%B8%E7%AD%89%E7%9A%84%E7%BA%BF%E6%AE%B5%2C%E5%B9%B6%E8%AF%B4%E6%98%8E%E7%90%86%E7%94%B1%EF%BC%882%EF%BC%89%E8%8B%A5%E2%88%A0abc%3D60%C2%B0%2C%E2%88%A0acb%3D80%C2%B0%2C%E6%B1%82%E2%88%A0a%E3%80%81%E2%88%A0boc%E7%9A%84%E5%BA%A6%E6%95%B0%EF%BC%883%EF%BC%89%E6%A0%B9%E6%8D%AE%EF%BC%882%EF%BC%89%E7%9A%84)
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