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如图，平面ABEF⊥平面ABCD，四边形ABEF与ABCD都是直角梯形，∠BAD=∠FAB=90°， ，G，H分别为FA，FD的中点． C，D，F，E四点是否共面为什么
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如图四边形ABEF和四边形ABCD均是直角梯形∠FAB=∠DAB=90°AF=AB=BC=2AD=1
如图四边形ABCD为矩形四边形ABEF为等腰梯形平面ABCD⊥平面ABEFAB∥EFAB=2AF∠
如图平面ABEF⊥平面ABCD四边形ABEF与四边形ABCD都是直角梯形∠BAD＝∠FAB＝90°B
如图平面ABCD⊥平面ABEF四边形ABCD是正方形四边形ABEF是矩形且AF＝AD＝aG.是EF的
如图平面ABCD⊥平面ABEF四边形ABCD是正方形四边形ABEF是矩形且AF＝G.是EF的中点则G
如图□ABCD中CE＝DF则四边形ABEF是____________.
如图平面ABEF⊥平面ABCD四边形ABEF与ABCD都是直角梯形∠BAD=∠FAB=90°BCBE
如图平面ABCD⊥平面ABEF四边形ABCD是正方形四边形ABEF是矩形且AF==aG是EF的中点则
如图直角梯形ABCD∠DAB=90°AB∥CDAB=AD∠ABC=60°.以AD为边在直角梯形ABC
如图平面ABEF⊥平面ABCD四边形ABEF与ABCD都是直角梯形∠BAD=∠FAB=90°BC∥A
如图正方形ABCD所在平面与平面四边形ABEF所在平面互相垂直△ABE是等腰直角三角形AB=AEFA
在如图所示的几何体中四边形ABCD为矩形平面ABEF⊥平面ABCDEF∥AB∠BAF=90°AD=2
如图平面ABCD⊥平面ABEF四边ABCD是正方形四边形ABEF是矩形且AF＝AD＝aG.是EF的中
如图平面ABEF⊥平面ABCD四边形ABEF与ABCD都是直角梯形∠BAD=∠FAB=90°
如图四边形ABEF是等腰梯形AB∥EFAF＝BE＝2EF＝4AB＝2ABCD是矩形.AD⊥平面ABE
如图平面ABEF⊥平面ABCD四边形ABEF与ABCD都是直角梯形∠BAD=∠FAB=90°
如图a所示在直角梯形ABCD中AB⊥ADAD∥BC为AD的中点E.在BC上且EF∥AB.已知AB=A
如图在多面体ABCDFE中四边形ABCD是菱形∠ABC=60°四边形ABEF是直角梯形∠FAB=9
如图平面ABEF⊥平面ABCD四边形ABEF与四边形ABCD都是直角梯形∠BAD＝∠FAB＝90°B
如图在同一个平面内四边形ABCD可以变化到四边形ABEF的位置关于这个过程下列叙述正确的是
四边形ABCD变化为四边形ABEF是图形的平移
四边形ABCD变化为四边形ABEF图形的旋转
点
运动到F.，这个过程是平移D.点D.运动到F.，这个过程是旋转
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