如图,△ABC中,∠ACB=90°,CD是高,∠A=30°.求证BD=1/4AB图片地址:http://hiphotos.baidu.com/%D0%C4%C4%C8%C2%F0/pic/item/5f87b67c67f3977f0dd7da36.jpg
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![如图,△ABC中,∠ACB=90°,CD是高,∠A=30°.求证BD=1/4AB图片地址:http://hiphotos.baidu.com/%D0%C4%C4%C8%C2%F0/pic/item/5f87b67c67f3977f0dd7da36.jpg](/uploads/image/z/5615693-53-3.jpg?t=%E5%A6%82%E5%9B%BE%2C%E2%96%B3ABC%E4%B8%AD%2C%E2%88%A0ACB%3D90%C2%B0%2CCD%E6%98%AF%E9%AB%98%2C%E2%88%A0A%3D30%C2%B0.%E6%B1%82%E8%AF%81BD%3D1%2F4AB%E5%9B%BE%E7%89%87%E5%9C%B0%E5%9D%80%EF%BC%9Ahttp%3A%2F%2Fhiphotos.baidu.com%2F%25D0%25C4%25C4%25C8%25C2%25F0%2Fpic%2Fitem%2F5f87b67c67f3977f0dd7da36.jpg)
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