如图 等腰梯形花圃ABCD的底边AD靠墙,另三边用长为40m的铁栏杆围成,设花圃的腰AB的长为Xm1:请求出底边BC的唱;(用含X的代数式表示)2:若角BAD=60度,该花圃的面积Sm².①:求S于x之间的函
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![如图 等腰梯形花圃ABCD的底边AD靠墙,另三边用长为40m的铁栏杆围成,设花圃的腰AB的长为Xm1:请求出底边BC的唱;(用含X的代数式表示)2:若角BAD=60度,该花圃的面积Sm².①:求S于x之间的函](/uploads/image/z/11604420-36-0.jpg?t=%E5%A6%82%E5%9B%BE+%E7%AD%89%E8%85%B0%E6%A2%AF%E5%BD%A2%E8%8A%B1%E5%9C%83ABCD%E7%9A%84%E5%BA%95%E8%BE%B9AD%E9%9D%A0%E5%A2%99%2C%E5%8F%A6%E4%B8%89%E8%BE%B9%E7%94%A8%E9%95%BF%E4%B8%BA40m%E7%9A%84%E9%93%81%E6%A0%8F%E6%9D%86%E5%9B%B4%E6%88%90%2C%E8%AE%BE%E8%8A%B1%E5%9C%83%E7%9A%84%E8%85%B0AB%E7%9A%84%E9%95%BF%E4%B8%BAXm1%EF%BC%9A%E8%AF%B7%E6%B1%82%E5%87%BA%E5%BA%95%E8%BE%B9BC%E7%9A%84%E5%94%B1%EF%BC%9B%EF%BC%88%E7%94%A8%E5%90%ABX%E7%9A%84%E4%BB%A3%E6%95%B0%E5%BC%8F%E8%A1%A8%E7%A4%BA%EF%BC%892%EF%BC%9A%E8%8B%A5%E8%A7%92BAD%3D60%E5%BA%A6%2C%E8%AF%A5%E8%8A%B1%E5%9C%83%E7%9A%84%E9%9D%A2%E7%A7%AFSm%26sup2%3B.%E2%91%A0%EF%BC%9A%E6%B1%82S%E4%BA%8Ex%E4%B9%8B%E9%97%B4%E7%9A%84%E5%87%BD)
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