24.如图,梯形ABCD中,AD//BC,BC =3AD,M、N为底边BC的三等分点,联结AM,DN.(1)\x09求证:四边形AMND是平行四边形;(2)\x09联结BD、AC,AM与对角线BD交于点G,DN与对角线AC交于点H,且 .试判断四边形AGHD的
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![24.如图,梯形ABCD中,AD//BC,BC =3AD,M、N为底边BC的三等分点,联结AM,DN.(1)\x09求证:四边形AMND是平行四边形;(2)\x09联结BD、AC,AM与对角线BD交于点G,DN与对角线AC交于点H,且 .试判断四边形AGHD的](/uploads/image/z/11647927-55-7.jpg?t=24%EF%BC%8E%E5%A6%82%E5%9B%BE%2C%E6%A2%AF%E5%BD%A2ABCD%E4%B8%AD%2CAD%2F%2FBC%2CBC+%3D3AD%2CM%E3%80%81N%E4%B8%BA%E5%BA%95%E8%BE%B9BC%E7%9A%84%E4%B8%89%E7%AD%89%E5%88%86%E7%82%B9%2C%E8%81%94%E7%BB%93AM%2CDN.%EF%BC%881%EF%BC%89%5Cx09%E6%B1%82%E8%AF%81%EF%BC%9A%E5%9B%9B%E8%BE%B9%E5%BD%A2AMND%E6%98%AF%E5%B9%B3%E8%A1%8C%E5%9B%9B%E8%BE%B9%E5%BD%A2%EF%BC%9B%EF%BC%882%EF%BC%89%5Cx09%E8%81%94%E7%BB%93BD%E3%80%81AC%2CAM%E4%B8%8E%E5%AF%B9%E8%A7%92%E7%BA%BFBD%E4%BA%A4%E4%BA%8E%E7%82%B9G%2CDN%E4%B8%8E%E5%AF%B9%E8%A7%92%E7%BA%BFAC%E4%BA%A4%E4%BA%8E%E7%82%B9H%2C%E4%B8%94+.%E8%AF%95%E5%88%A4%E6%96%AD%E5%9B%9B%E8%BE%B9%E5%BD%A2AGHD%E7%9A%84)
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