我们把两组邻边相等的四边形叫做“筝形”.如图,四边形是一个筝

我们把两组邻边相等的四边形叫做“筝形”.如图,四边形是一个筝形,其中.对角线相交于点,垂足分别是.求证

 


答案

证明:在ABDCBD

SSS       ……………………………4

BD平分∠ABC                ……………………………6

又∵         ……………………………8

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