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如图所示,△ABC中,DE∥BC,若,则下列结论中不正确的是( )
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教案备课库《2017-2018学年福建省莆田市秀屿区九年级(上)期末数学试卷》真题及答案
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如图在△ABC中AB=ACD.是BC的中点下列结论不正确的是
AD⊥BC
∠B.=∠
C. AB=2BD
AD平分∠BAC
如图在△ABC和△CDE中若∠ACB=∠CED=90°AB=CDBC=DE则下列结论中不正确的是
△ABC≌△CDE
CE=AC
AB⊥CD
E为BC中点
如图所示已知在△ABC中∠A.=90°AB=ACCD平分∠ACBDE⊥BC于E.若BC=15cm则△
如图△ABC中AB=ACD.是BC中点下列结论中不正确的是
∠
=∠CB.AD⊥BC
AD平分∠BAC
AB=2BD
如图在△ABC中点D是AB边的中点点E在AC边上不与端点重合. 1若AB=BC且BD=DE求证D
已知如图所示AC=CD∠B.=∠E.=90°AC⊥CD则不正确的结论是
∠A.与∠D.互为余角
∠A.=∠2
△ABC≌△CED
∠1=∠2
如图在△ABC中AB=ACE.F.分别是BCAC的中点以AC为斜边作Rt△ADC若∠CAD=∠CAB
∠ECD=112.5°
DE平分∠FDC
∠DEC=30°
AB=
CD
如图在△ABC中AB=ACD.是BC的中点下列结论不正确的是
AD⊥BC
∠B.=∠
C. AB=2BD
AD平分∠BAC
如图所示已知在△ABC中∠A.=90°AB=ACCD平分∠ACBDE⊥BC于E.若BC=15cm则△
如图在△ABC中AB=ACDE∥BC则下列结论中不正确的是
AD=AE
DB=EC
∠ADE=∠C
DE=
BC
,
4.00分在△ABC中点DE分别在ABAC边上∠B=∠AED那么下列结论中不正确的是
AC边上,∠B=∠AED,那么下列结论中不正确的是( )
A.AD:AC=AE:AB B.AD•AB=AE•AC
DE:BC=AD:AC
DE:BC=AD:AB
如图在△ABC中AB=ACDE∥BC则下列结论中不正确的是
AD=AE
DB=EC
∠ADE=∠C.
DE=
BC
如图所示在Rt△ABC中AD是斜边上的高∠ABC的平分线分别交AD.AC于点F.E.EG⊥BC于G.
∠C.=∠ABC
BA=BG
AE=CE
AF=FD
如图在△ABC中AB=ACDE∥BC则下列结论中不正确的是
AD=AE
DB=EC
∠ADE=∠C
DE=
BC
如图在△ABC中AB=ACAD⊥BCBE⊥AC则下列结论不正确的是
BD=DC
CE=AE
∠BAD=∠CAD
∠CBE=∠DAC
图在△ABC中AB=ACDE∥BC则下列结论中不正确的是
AD=AE
DB=EC
∠ADE=∠C
DE=
BC
如图所示在△ABC中AB=ACDE垂直平分AB于点E.交AC于点D.若△ABC的周长为26BC=6求
如图△ABC中AB=ACD.是BC中点下列结论中不正确的是
∠
=∠
B.AD⊥BC C.AD平分∠BAC
AB=2BD
如图所示在△ABC中∠C.=90°D.是AC上一点DE⊥AB于点E.若AB=10BC=6DE=2求四
如图所示△ABD≌△CDB下面四个结论中不正确的是
△ABD和△CDB的面积相等
△ABD和△CDB的周长相等
∠A.+∠ABD=∠C.+∠CBD
AD∥BC,且AD=BC
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