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Move two matches to change the direction of the room.
Analysis? Just move the ① ② two matches in 438+0 of Figure 65438 to the position in Figure 2, as shown.

Answer? Solution: Just move the two matches in figure ① ② 1 to the position in figure 2.

Comments: This topic examines the relevant knowledge of three-dimensional graphics, and examines students' spatial imagination and hands-on ability. When solving this kind of problem, we should pay attention to the condition that only two matches can be moved. Correctly understanding the meaning of the problem is the key to solving it.

Details:

Spatial imagination is people's abstract thinking ability to observe, analyze and understand the spatial form (spatial geometry) of objective things. Cultivating students' spatial imagination is one of the main tasks and difficulties in middle school mathematics teaching.

In teaching, if the term "spatial imagination" is mentioned too much, and the rational analysis is not enough to grasp the training law, it may lead to the result that a few savvy students' spatial imagination has been improved, but most students have benefited little, and even regard the study of "solid geometry" as a timid road.