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qiao zuo san jiao xing de wai jie yuan zheng ti
Author(s): 
Pages: 27-29
Year: Issue:  6
Journal: Required Reading for Junior Middle School Students

Keyword:  外接圆 三角形 直接证明 直线 平分线 线段 分析 延长 证题 三角不等式;
Abstract: <正>在处理某些看似与圆无关的三角形问题时,若能根据题意巧作三角形的外接圆,则可应用圆的有关性质,简便快捷地将题目证出.下面举例说明.一、证明线段相等
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