(通用版)2019版高考数学二轮复习第二部分第一板块学通考场解题常用12术第6术蹊径可辟分割补形课件理(重点生).ppt

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6,术,第,在解决几何问题过程中,割补法是一种常用的方法无论是平面几何、解析几何、还是立体几何,适时使用割补法,能帮助我们找到问题的突破口,把问题放到特殊的几何图形中,借助特殊图形分析问题,有时会柳暗花明,事半功倍,应用题型,所谓割补法就是把一个复杂面积或体积的计算分割成若干个简单图形的有关计算或将一个不易求出面积或体积的几何图形补足为较易计算的几何图形也就是将复杂的或不熟悉的几何图形转化为简单的熟悉的几何图形或几何体例如,把曲边形割补成规则图形、把斜棱柱割补成直棱柱、把三棱柱补成平行六面体、把三棱锥补成三棱柱或平行六面体、把多面体切割成锥体(特别是三棱锥)、把不规则的几何体割补成规则的几何体,从而把未知的转化为已知的、把陌生的转化为熟悉的、把复杂的转化为简单的、把不够直观的转化为直观易懂的,方法概述,谢谢观看,

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