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如图,点A、B、C、D在⊙O上,∠AOC=140°,点B是的中点,则∠D的度数是( )
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如图点O.是直线AB上一点∠AOC=40°OD平分∠AOC∠COE=70°.1请你说明OD⊥OE2O
如图所示点O.是直线AB上一点OEOF分别平分∠AOC和∠BOC若∠AOC=68°则∠BOF和∠EO
如图点A.O.B.在一条直线上∠AOC=140°OD是∠BOC的平分线则∠COD=_________
如图点
B.C.都在⊙O.上,若∠AOC=140°,则∠
的度数是( )
A.70°B.80°
110°
140°
如图AB是⊙O的直径点C.为⊙O上一点∠AOC=50°则∠ABC=.
.如图O.是直线AB上一点∠AOC=50°则∠BOC的度数是
120°
130°
140°
150°
如图直线AB与直线CD相交于点O.OE⊥AB垂足为O.∠EOD=∠AOC则∠BOC=
150°
140°
130°
120°
如图AB是⊙O的直径点C.为⊙O上一点∠AOC=50°则∠ABC=°.
如图
B.C.是⊙O.上的三点,∠
=75°,则∠AOC的度数是( ) A.120°B.130°
140°
150°
1如图①所示点O.在直线AC上过O.点作射线OB请画出∠COB的平分线OF和∠AOB的平分线OE求∠
如图AB.CD交于点O∠AOE=90°若∠AOC∠COE=54则∠AOD等于
150°
140°
120°
130°
如图直线AB与CD相交于点O.∠COE=2∠BOE.若∠AOC=120°则∠DOE等于
135°
140°
145°
150°
如图点
B.C是⊙O上三点,∠AOC=130°,则∠ABC等于( ) A. 50°
60°
65°
70°
如图点
B.C.都在⊙O.上,若∠AOC=140°,则∠
的度数是 A.70°B.80°
110°
140°
如图A.B.C.是⊙O.上的三个点若∠AOC=100°则∠ABC等于__
如图直线l经过⊙O的圆心O且与⊙O交于A.B两点点C在⊙O上且∠AOC=30°点P是直线l上的一个动
如图
B.C.是⊙O.上的三点,∠
=75°,则∠AOC的度数是( )
A.150°B.140°
130°
120°
如图
,
,
是⊙O上的三点,且∠ABC=70°,则∠AOC的度数是( ) A.35°B.140°C.70°
70°或140°
如图
B.C.三点都在⊙O上,点D.是AB延长线上一点,∠AOC=140°, ∠CBD 的度数是( ) A.40°
50°
70°
110°
如图过直线AB上一点O.作射线OC∠BOC=29°18′则∠AOC的度数为
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