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如图，AB为⊙O的直径，C为⊙O上一点，∠ABC的平分线交⊙O于点D，DE⊥BC于点E． （1）试判断DE与⊙O的位置关系，并说明理由； （2）过点D作DF⊥AB于点F，若BE＝3，DF＝3，求...
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如图在△ABC中∠ABC=90°.1作∠ACB的平分线交AB边于点O再以点O为圆心OB的长为半径作⊙
如图在△ABC中AB=ACAE是∠BAC的平分线∠ABC的平分线BM交AE于点M点O在AB上以点O为
已知如图在△ABC中AB=ACAE是角平分线BM平分∠ABC交AE于点M经过B.M两点的⊙O.交BC
已知如图在△ABC中AB=ACAE是角平分线BM平分∠ABC交AE于点M经过B.M两点的⊙O.交BC
已知如图在△ABC中AB=ACAE是角平分线BM平分∠ABC交AE于点M经过B.M两点的⊙O.交BC
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⊙
如图在⊙O.中AB为直径点C.在⊙O.上∠ACB的平分线交⊙O.于D.则∠ABD=°
已知如图在△ABC中AB=ACAE是角平分线BM平分∠ABC交AE于点M经过B.M两点的⊙O.交BC
如图在Rt△ABC中∠C.＝90°∠ABC的平分线交AC于点D.点O.是AB上一点⊙O过B.D.两点
.如图在△ABC中AB=4AC=6∠ABC和∠ACB的平分线交于O.点过点O.作BC的平行线交AB于
如图AB为⊙O.的直径C.为⊙O.上一点∠ABC的平分线交⊙O.于点D.DE⊥BC于点E.1试判断D
如图△ABC中AB=AC∠BAC=54°∠BAC的平分线与AB的垂直平分线交于点O将∠C沿EFE在B
已知如图在△ABC中AB＝ACAE是角平分线BM平分∠ABC交AE于点M.经过B.M.两点的⊙O.交
如图AB是⊙O.的直径点C.是⊙O.上一点∠BAC的平分线AD交⊙O.于点D.过点D.垂直于AC的直
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.
已知如图在△ABC中AB=ACAE是角平分线BM平分∠ABC交AE于点M经过B.M两点的⊙O.交BC
已知如图在△ABC中AB=ACAE是角平分线BM平分∠ABC交AE于点M经过B.M两点的⊙O.交BC
已知如图在△ABC中AB＝ACAE是角平分线BM平分∠ABC交AE于点M.经过B.M.两点的⊙O交B
已知如图△ABC内接于⊙O.AB为直径∠CBA的平分线交AC于点F.交⊙O.于点D.DE⊥AB于点E
如图在△ABC中AB=ACAE是∠BAC的平分线∠ABC的平分线BM交AE于点M.点O.在AB上以点
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