如图,已知AB=AC=16,DE垂直平分AB,当三角形BEC的周长为26是,求BC的长谢谢)图在:file://C:\Documents and Settings\Administrator\Local Settings\Temporary Internet Files\Content.IE5\CYWFJHOP\20080921144248-618825480[1].jpg
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/20 16:33:45
![如图,已知AB=AC=16,DE垂直平分AB,当三角形BEC的周长为26是,求BC的长谢谢)图在:file://C:\Documents and Settings\Administrator\Local Settings\Temporary Internet Files\Content.IE5\CYWFJHOP\20080921144248-618825480[1].jpg](/uploads/image/z/5325603-51-3.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%B7%B2%E7%9F%A5AB%3DAC%3D16%2CDE%E5%9E%82%E7%9B%B4%E5%B9%B3%E5%88%86AB%2C%E5%BD%93%E4%B8%89%E8%A7%92%E5%BD%A2BEC%E7%9A%84%E5%91%A8%E9%95%BF%E4%B8%BA26%E6%98%AF%2C%E6%B1%82BC%E7%9A%84%E9%95%BF%E8%B0%A2%E8%B0%A2%EF%BC%89%E5%9B%BE%E5%9C%A8%EF%BC%9Afile%3A%2F%2FC%3A%5CDocuments+and+Settings%5CAdministrator%5CLocal+Settings%5CTemporary+Internet+Files%5CContent.IE5%5CCYWFJHOP%5C20080921144248-618825480%5B1%5D.jpg)
如图,已知AB=AC=16,DE垂直平分AB,当三角形BEC的周长为26是,求BC的长谢谢)图在:file://C:\Documents and Settings\Administrator\Local Settings\Temporary Internet Files\Content.IE5\CYWFJHOP\20080921144248-618825480[1].jpg
如图,已知AB=AC=16,DE垂直平分AB,当三角形BEC的周长为26是,求BC的长
谢谢)图在:file://C:\Documents and Settings\Administrator\Local Settings\Temporary Internet Files\Content.IE5\CYWFJHOP\20080921144248-618825480[1].jpg
如图,已知AB=AC=16,DE垂直平分AB,当三角形BEC的周长为26是,求BC的长谢谢)图在:file://C:\Documents and Settings\Administrator\Local Settings\Temporary Internet Files\Content.IE5\CYWFJHOP\20080921144248-618825480[1].jpg
10
BE=AE BE+EC=AC=16
BC=26-BE-CE=26-16=10
你的图在你的电脑上我们怎么看啊
图看不到~~~~
周长=26=BE+CE+BC,
因为DE为垂直平分线,所以ADE与BDE为全等三角形,
所以BE=AE,所以三角形BEC的周长=BC+CE+AE=AC+BC=26,
且AC=16,所以BC=10