如图,AD、BE分别是△ABC的中线和角平分线,AD⊥BE,AD=BE=12,则AC的长等于_____ .
![](https://img.xkw.com/dksih/QBM/2020/11/3/2584750196572160/2596469753667584/STEM/6a19178510aa461bb67084591104caa4.png?resizew=205)
更新时间:2020-11-20 14:06:14
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【推荐1】如图,在矩形
中,
,点E、F分别是边AD、BC上的动点,且
,当
取得最小值时,AE的长为______ .
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【推荐2】如图,锐角△ABC中,D,E分别是AB,AC边上的点,△ADC≌△ADC',△AEB≌△AEB',且C'D∥EB'∥BC,记BE,CD交于点F,若∠BAC=x°,则∠BFC的大小是_____ °.(用含x的式子表示)
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【推荐1】已知在
中,
,点D、E分别是AC、BC的中点,连接DE,在DE上有一点F,
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,则AB=______ .
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【推荐2】如图,在半径为2的扇形
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的面积为y,试写出y与x的函数关系式___________ .
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