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如图,在中,AB<BC,以点A为圆心,AB长为半径作圆弧交AD于点F,再分别以点B、F为圆心,大于BF的一半长为半径画圆弧,两弧交于一点P,连结AP并延长交BC于点E,连结EF.(1)四边形ABEF...
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如图在△ABC中AB=AC∠
=30°,以
为圆心,BC的长为半径圆弧,交AC于点D.,连接BD,则∠ABD=( )
A.30°B.45°
60°
90°
如图AB∥CD以点A为圆心小于AC长为半径作圆弧分别交ABAC于EF两点再分别以E.F为圆心大于EF
如图14AB∥CD以点A.为圆心小于AC长为半径作圆弧分别交ABAC于E.F.两点再分别以E.F.为
如图在矩形ABCD中AB=4AD=2以点A.为圆心AB长为半径画圆弧交边DC于点E.则弧BE的长度为
如图以△ABC的顶点B为圆心AB长为半径作圆弧交BC于点D以顶点C为圆心AC长为半径作圆弧交BC于点
如图在Rt△ABC中∠ACB=90°以点
为圆心,AC长为半径作圆弧交边AB于点D.若 AC=3,BC=4.则BD的长是( )
A.2
3
4
5
如图AB∥CD以点A.为圆心小于AC长为半径作圆弧分别交ABAC于E.F.两点再分别以E.F.为圆心
如图在△ABC中∠C=90°按以下步骤作图①以点A为圆心小于AC的长为半径作圆弧分别交ABAC于点E
如图AB∥CD以点
为圆心,小于AC长为半径作圆弧,分别交A
AC于E.F.两点;再分别以E.F.为圆心,大于
EF长为半径作圆弧,两条圆弧交于点G.,作射线AG交CD于点H..若∠
=140°,则∠AHC的大小是( )
A.20°B.25°C.30°
40°
.如图在△ABC中AB>AC按以下步骤作图分别以点B.和点C.为圆心大于BC一半的长为半径作圆弧两弧
如图AB∥CD以点A.为圆心小于AC长为半径作圆弧分别交ABAC于E.F.两点再分别以E.F.为圆心
如图AB∥CD以点
为圆心,小于AC长为半径作圆弧,分别交AB,AC于点E.F.,再分别以E.F.为圆心,大于
EF的同样长为半径作圆弧,两弧交于点P.,作射线AP,交CD于点M..若∠ACD=110°,则∠CMA的度数为 A.30°
35°
70°
45°
已知线段AB按以下步骤作图①分别以点A点B为圆心以AB长为半径作圆弧两弧相交于点C②连结ACBC③
如图在Rt△ABC中∠BAC=90°AB=4AC=6.以点A为圆心AB长为半径作圆弧交AC于点D分
如图AB∥CD以点A.为圆心小于AC长为半径作圆弧分别交ABAC于E.F.两点再分别以E.F.为圆心
如图在矩形ABCD中AB=4AD=2以点A.为圆心AB长为半径画圆弧交边DC于点E.由线段ECBC弧
如图AB∥CD以点A.为圆心小于AC长为半径作圆弧分别交ABAC于E.F.两点再分别以E.F.为圆心
如图AB∥CD以点A为圆心小于AC长为半径作圆弧分别交ABAC于EF两点再分别以EF.为圆心大于EF
如图AB∥CD以点
为圆心,小于AC长为半径作圆弧,分别交A
AC于E.F.两点;再分别以E.F.为圆心,大于
EF长为半径作圆弧,两条圆弧交于点G.,作射线AG交CD于点H..若∠
=140°,则∠AHC的大小是( )
A.20°B.25°C.30°
40°
如图在△ABC中AB=AC∠A=30°以B为圆心BC的长为半径圆弧交AC于点D连接BD则∠ABD=
30°
45°
60°
90°
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