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如图，矩形ABCD，AB＝2，BC＝10，点E为AD上一点，且AE＝AB，点F从点E出发，向终点D运动，速度为1cm/s，以BF为斜边在BF上方作等腰直角△BFG，以BG，BF为邻边作▱BFHG，连...
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如图在矩形ABCD中AB=6cm点E.F.分别是边BCAD上一点将矩形ABCD沿EF折叠使点C.D.
1如图1在正方形ABCD中E.是AB上一点F.是AD延长线上一点且DF=BE.求证CE=CF2如图2
已知矩形ABCDAD在y轴上AB=3BC=2点A的坐标为01点D的坐标为0-1在AB边上有一点E21
1如图1在正方形ABCD中E.是AB上一点F.是AD延长线上一点且DF＝BE.求证CE＝CF2如图2
如图在一张矩形纸片ABCD中AB=4BC=8点E.F.分别在ADBC上将纸片ABCD沿直线EF折叠点
如图在矩形ABCD中点E.是CD的中点点F.是BC上一点且FC＝2BF连接AEEF.若AB＝2AD＝
1如图1在正方形ABCD中E.是AB上一点F.是AD延长线上一点且DF=BE.求证CE=CF2如图2
如图矩形ABCD中AB=2BC=3点E.为AD上一点且∠ABE=30°将△ABE沿BE翻折得到△A.
1如图1在正方形ABCD中E.是AB上一点F.是AD延长线上一点且DF=BE.求证CE=CF2如图2
在矩形纸片ABCD中AB=6BC=8.1如图①将矩形纸片沿AN折叠点B.落在对角线AC上的点E.处求
如图已知矩形ABCD中E.是AD上的一点F.是AB上的一点EF⊥EC且EF=ECDE=4cm矩形AB
如图折叠矩形纸片ABCD使B.点落在AD上一点E.处折痕的两端点分别在ABBC上含端点且AB=6BC
如图矩形纸片ABCD中AB=6cmAD=10cm点EF在矩形ABCD的边ABAD上运动将△AEF沿E
1如图1已知正方形ABCDE.是AD上一点F.是BC上一点G.是AB上一点H.是CD上一点线段EFG
1如图1在正方形ABCD中E.是AB上一点F.是AD延长线上一点且DF=BE.求证CE=CF2如图2
如图在矩形ABCD中AB=8BC=10E是AB上一点将矩形ABCD沿CE折叠后点B落在AD边的F点上
如图在矩形ABCD中AB=8BC=10E.是AB上一点将矩形ABCD沿CE折叠后点B.落在AD边的点
1如图1在正方形ABCD中E.是AB上一点F.是AD延长线上一点且DF＝BE.求证CE＝CF2如图2
如图折叠矩形纸片ABCD使B.点落在AD上一点E.处折痕的两端点分别在ABBC上且AB=6BC=10
如图矩形ABCD中AB=8点E.是AD上的一点有AE=4BE的垂直平分线交BC的延长线于点F.连结E
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