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.3.3_2.3.4直线与平面垂直的性质平面与平面垂直的性质情境导学素材新人教A版必修2.doc

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12.3.3-2.3.4 直线与平面垂直的性质 平面与平面垂直的性质【情境导学】实例:(1)在日常生活中常见到一排排和地面垂直的电线杆.这些电线杆中的每根杆都与地面垂直.(2)在建筑或装修房屋时,经常会看到工人师傅在竖直的墙壁上寻找与地面垂直的线.1:实例(1)中这些杆之间存在什么位置关系?(电线杆与电线杆之间相互平行)2:实例(2)中工人师傅如何找到这条线呢?(只要在墙上画一条与地面和墙壁的交线垂直的直线就符合要求)

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