三角形计算题在△ABC中,∠B= 1/2∠ACB ,∠ABC的外角平分线AD交BC的延长线于点D,若∠ADC=1/3如图,在△ABC中,∠B=1/2∠ACB ∠ABC的外角平分线AD交BC的延长线于点D,若∠ADC=1/3∠CAD,求∠B
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![三角形计算题在△ABC中,∠B= 1/2∠ACB ,∠ABC的外角平分线AD交BC的延长线于点D,若∠ADC=1/3如图,在△ABC中,∠B=1/2∠ACB ∠ABC的外角平分线AD交BC的延长线于点D,若∠ADC=1/3∠CAD,求∠B](/uploads/image/z/14303217-57-7.jpg?t=%E4%B8%89%E8%A7%92%E5%BD%A2%E8%AE%A1%E7%AE%97%E9%A2%98%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2C%E2%88%A0B%3D+1%2F2%E2%88%A0ACB+%2C%E2%88%A0ABC%E7%9A%84%E5%A4%96%E8%A7%92%E5%B9%B3%E5%88%86%E7%BA%BFAD%E4%BA%A4BC%E7%9A%84%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%BA%8E%E7%82%B9D%2C%E8%8B%A5%E2%88%A0ADC%3D1%2F3%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2C%E2%88%A0B%3D1%2F2%E2%88%A0ACB+%E2%88%A0ABC%E7%9A%84%E5%A4%96%E8%A7%92%E5%B9%B3%E5%88%86%E7%BA%BFAD%E4%BA%A4BC%E7%9A%84%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%BA%8E%E7%82%B9D%2C%E8%8B%A5%E2%88%A0ADC%3D1%2F3%E2%88%A0CAD%2C%E6%B1%82%E2%88%A0B)
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