如图,在平行四边形ABCD中,BC=13,AC=12,AE平分∠BAC,BA⊥AC,BE⊥AE,F是BC的中点,则EF=___________
![](https://img.xkw.com/dksih/QBM/2022/4/24/2965157347803136/3011812700921856/STEM/67914efd5a554628a62c5be099c1507e.png?resizew=212)
更新时间:2022-06-29 15:31:32
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【推荐1】在△ABC中,∠BAC=90°,AB=AC,BE平分∠ABC交AC于点D,CE⊥BE,若CE=1,则BD的长为_____ .
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【推荐2】如图,的两条直角边
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【推荐1】如图,为修通铁路凿通隧道AC,量出
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【推荐2】如图,
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【推荐1】如图,平行四边形
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【推荐2】如图,在□ABCD中,对角线AC和BD交于点O,点E为AB边上的中点,OE=2.5cm,则AD=________ cm.
![](https://img.xkw.com/dksih/QBM/2019/9/23/2296665117343744/2297561135063040/STEM/a3bccd1f3f1144bf80e58b3e00e9c167.png?resizew=167)
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