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如图,AB为⊙O的直径,C,D为⊙O上的点,=.若∠CAB=42°,则∠CAD=
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如图已知AB是⊙O.的直径点C.在⊙O.上若∠CAB=40°则∠ABC的度数为.
已知⊙O.的直径为10点A.点B.点C.在⊙O.上∠CAB的平分线交⊙O.于点D.Ⅰ如图①若BC为⊙
如图AB为⊙O.的直径点C.为半圆上一点AD平分∠CAB交⊙O.于点D.连接OD.1求证OD//AC
在⊙O.中AB为直径C.为⊙O.上一点.Ⅰ如图①过点C.作⊙O.的切线与AB的延长线相交于点P.若∠
如图四边形ABCD内接于⊙O.AB为⊙O.的直径C.为BD弧的中点ACBD交于点E.1求证△CBE∽
在⊙O.中AB为直径C为⊙O.上一点.Ⅰ如图1过点C.作⊙O.的切线与AB的延长线相交于点P若∠CA
如图AB是⊙O.的直径C.是⊙O.上一点AC平分∠BADAD⊥CD垂足为D.1求证CD是⊙O.的切线
如图AB是⊙O.的直径点C.是⊙O.上的一点若BC=3AB=5OD⊥BC于点D.则OD的长为.
如图△ABC是⊙O.的内接三角形AB为⊙O.的直径点D.为⊙O.上一点若∠CAB=55°则∠ADC的
已知如图△ABC中AB=AC以AB为直径的⊙O.交BC于点P.PD⊥AC于点D.1求证PD是⊙O.的
已知⊙O.的直径为10点A.点B.点C.在⊙O.上∠CAB的平分线交⊙O.于点D.如图若BC为⊙O.
如图在△ABC中∠CAB=90°∠CBA=50°以AB为直径作⊙O.交BC于点D.点E.在边AC上且
已知⊙O.的直径为10点A.点B.点C.在⊙O.上∠CAB的平分线交⊙O.于点D.Ⅰ如图①若BC为⊙
已知如图△ABC中AB=AC以AB为直径的⊙O.交BC于点P.PD⊥AC于点D.1求证PD是⊙O.的
已知如图△ABC中AB=AC以AB为直径的⊙O.交BC于点P.PD⊥AC于点D.1求证PD是⊙O.的
如图△ABC内接于⊙OAB为⊙O的直径∠CAB=60°弦AD平分∠CAB.若AD=6则AC=.
如图14已知CD是⊙O.的直径点A.为CD延长线上一点BC=AB∠CAB=30°.1求证AB是⊙O.
如图AB是⊙O.的直径C.为⊙O.上一点经过点C.的直线与AB的延长线交于点D.连接ACBC∠BCD
如图C.D.是以线段AB为直径的⊙O.上的两点若CA=CD且∠ACD=40°则∠CAB的度数为.
已知⊙O.的直径为10点A.点B.点C.在⊙O.上∠CAB的平分线交⊙O.于点D.Ⅰ如图①若BC为⊙
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