很多同学小时候玩过七巧板,用七巧板拼过图案,知道在拼的过程中,任何一块七巧板都是可活动的,我们想把它放在什么位置,它就可以在什么位置,正是这个原因,所拼图案也就各式各样,千变万化.其实,平面几何里的不少图形,也可以看成是由七巧板拼成的,移动其,中的一块或数块,有时能很 Many of my classmates had played jigsaw puzzles in my childhood and used tangrams to fight through patterns. I knew that any piece of jigsaw puzzle was movable during the fight. What position would we like to place it on? It was precisely for this reason. The spelling pattern is also varied and ever-changing. In fact, a lot of graphics in the plane geometry can also be seen as being made up of jigsaw puzzles. Moving them, one or several blocks, sometimes it can be very