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如图，边长为2的菱形ABCD中，E，F分别是AB，BC的中点，将△DAE，△DCF分别沿DE，DF折起，使A，C重合于点P． （Ⅰ）已知G为线段PD上的一点，满足，求证：PB∥平面EFG． （Ⅱ...
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如图在▱ABCD中BC=2AB=4点E.F.分别是BCAD的中点.1求证△ABE≌△CDF2当四边形
在菱形ABCD中E.为AB的中点OE=5则菱形ABCD的边长为__________.
如图在□ABCD中BC=2AB=4点E.F.分别是BC.AD的中点.1求证△ABE≌△CDF2当四边
如图在四棱锥P﹣ABCD中底面是边长为2的菱形∠BAD=60°对角线AC与BD相交于点OPO⊥底AB
如图在菱形ABCD中∠
=110°,E,F分别是边AB和BC的中点,EP⊥CD于点P,则∠FPC=( ) A.35°
45°
50°
55°
如图11所示在菱形ABCD中E.F.分别是AB.AC的中点如果EF=2那么ABCD的周长是
4
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如图菱形ABCD中E.F.分别是AB.AC的中点若EF=3则菱形ABCD的周长是
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如图菱形ABCD中AB＝4∠B.＝60°E.F.分别是BCDC上的点∠EAF＝60°连接EF则△AE
如图菱形ABCD中AB=4∠B.=60°E.F.分别是BCDC上的点∠EAF=60°连接EF则△AE
如图在□ABCD中BC=2AB=4点E.F.分别是BCAD的中点.1求证△ABE≌△CDF2当四边形
如图在菱形ABCD中E.F.分别是AB.AC的中点如果EF＝2那么菱形ABCD的周长是.
4
8
12
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如图在□ABCD中BC＝2AB＝4点EF.分别是BCAD的中点.1求证△ABF≌△CDF2当四边形A
如图在菱形ABCD中∠B=60°AB=2cmEF分别是BCCD的中点连接AEEFAF则△AEF的周长
A
B
C
D
如图在△ABC中AB＝BCD.E.F.分别是BCACAB的中点.1求证四边形BDEF是菱形2若AB＝
如图在边长为+1的菱形ABCD中∠A.=60°点E.F.分别在ABAD上沿EF折叠菱形使点A.落在B
如图在菱形ABCD中∠B.=60°AB=2E.F分别是BC.CD的中点连接AE.EFAF则△AEF的
如图在▱ABCD中BC=2AB=4点E.F分别是BC.AD的中点.1求证△ABE≌△CDF2当四边形
如图在菱形ABCD中∠A=60°EF分别是ABAD的中点若EF=2则菱形ABCD的边长是．
如图在菱形ABCD中AC是对角线点E.F.分别是边BCAD的中点.1求证△ABE≌△CDF2若∠B.
如图在菱形ABCD中∠A=110°E.F.分别是边AB和BC的中点EP⊥CD于点P.则∠PEF=
35°
45°
50°
55°
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