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2018_2019学年高中数学第二章点、直线、平面之间的位置关系2.2.2平面与平面平行的判定情境导学素材新人教A版必修2.doc

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2018_2019学年高中数学第二章点、直线、平面之间的位置关系2.2.2平面与平面平行的判定情境导学素材新人教A版必修2.doc_第1页
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12.2.2 平面与平面平行的判定【情境导学】 把三角板放置在课桌面上方,如果保持三角板的一条边与课桌面平行,观察两个平面的位置关系,如果两条边与课桌面平行,观察两个平面的位置关系,如果换成课本与课桌面,课本的两条边与课桌面平行时,两个平面有什么关系.三角板有两条边与课桌面平行,那么两个平面有什么位置关系?课本的两条边与课桌面平行呢?(当三角板两条边平行于课桌面时,两个平面平行,课本的两条边平行于课桌面时,两个平面位置不能确定,需要考虑是哪两条边,若是平行边则不能判定平行,相交的两边则可以)

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