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北宋文豪苏轼在《题西林壁》中写道:“横看成岭侧成峰,远近高低各不同。”这两句诗不仅让读者领略了庐山远看、近看、高处看、低处看的千变万化的美景,更揭示了庐山的正面图、侧面图、远景、近景、高空俯视图、山脚仰视图各不相同的道理。对于物体的三视图,在实际问题中有很多的应用,在新课标高考中也是一大热点。1.三视图的判定问题根据给定的空间几何图形(一般是较复杂的空间几何体),判定或作出其三视图中对应的视图。
In the Northern Song Dynasty Wen Hao Su Shi wrote in the title “Xilin wall” wrote: “horizontal as the ridge into a peak, the distance is different.” These two poems not only allow readers to enjoy the Lushan distance, near, Low point of view of ever-changing beauty, but also reveals the Lushan front view, side view, distant view, close-range view, aerial top view, bottom view of different footsteps truth. For the three views of the object, there are many applications in practical problems, and it is also a hot topic in the entrance examination of the new curriculum. 1. Three view of the decision problem According to the given space geometry (usually more complex space geometry), determine or make its corresponding view of the three views.