如图,在梯形ABCD中,AD//BC,E、F分别为AB、CD的中点,EF分别交BD、AC于点G、H.求证:GH=1/2(BC-AD)过程清楚点,写得好加分
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![如图,在梯形ABCD中,AD//BC,E、F分别为AB、CD的中点,EF分别交BD、AC于点G、H.求证:GH=1/2(BC-AD)过程清楚点,写得好加分](/uploads/image/z/2560846-22-6.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E6%A2%AF%E5%BD%A2ABCD%E4%B8%AD%2CAD%2F%2FBC%2CE%E3%80%81F%E5%88%86%E5%88%AB%E4%B8%BAAB%E3%80%81CD%E7%9A%84%E4%B8%AD%E7%82%B9%2CEF%E5%88%86%E5%88%AB%E4%BA%A4BD%E3%80%81AC%E4%BA%8E%E7%82%B9G%E3%80%81H.%E6%B1%82%E8%AF%81%EF%BC%9AGH%3D1%2F2%EF%BC%88BC-AD%EF%BC%89%E8%BF%87%E7%A8%8B%E6%B8%85%E6%A5%9A%E7%82%B9%2C%E5%86%99%E5%BE%97%E5%A5%BD%E5%8A%A0%E5%88%86)
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