几何图形问题,常常会使我们感到山重水复疑无路,此时你若尝试旋转一下图形中的某一部分,也许你便会感觉到柳暗花明又一村.其实,“旋转”就是对原图形进行重新整合.那么,什么样的图形问题适合用“旋转”方法解呢?一般情况下,这类图形的共同特点就是至少含有两条有公共端点的等长线段,且多数伴随有特殊角,如30°,60°或90°角等.解决的首要策略基本是顺时针或逆时针旋 Geometry problems, often make us feel troubled mountains and water, this time if you try to rotate a part of the graphics, maybe you will feel the illustrious village.In fact, “rotation ” is the original Graphics, then what kind of graphics problem is suitable for the “rotation ” method to solve it? Under normal circumstances, the common feature of such graphics is to have at least two lines with the same length of the common endpoint, and most with Special angles, such as 30 °, 60 ° or 90 °, etc. The primary strategy to solve is basically clockwise or counterclockwise rotation