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如图,已知OA⊥OC,OB⊥OD,且∠AOD=3∠BOC,求∠BOC的度数.
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如图OA=OCOB=ODOA⊥OBOC⊥OD下列结论①△AOD≌△COB②CD=AB③∠CDA=∠A
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如图OA=OCOB=OD且OA⊥OBOC⊥OD下列结论①△AOD≌△COB②CD=AB③∠CDA=∠
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如图OA⊥OBOC⊥OD.若∠AOD=144°则∠BOC=.
如图OA=OCOB=OD且OA⊥OBOC⊥OD下列结论①△AOD≌△COB②CD=AB③∠CDA=∠
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已知如图直线AD与BC交于点O.OA=ODOB=OC.求证⊿AOB≌⊿DOC
如图OB⊥ODOA⊥OC且∠BOC=58°则∠AOD的度数为.
如图OA⊥OBOC⊥ODO是垂足∠BOC=55°那么∠AOD=.
如图OA⊥OB引射线OC点C.在∠AOB外OD平分∠BOCOE平分∠AOD.1若∠BOC=40°请依
如图已知OA⊥OCOB⊥OD∠BOC=50°则∠AOD的度数为.
如图所示OA⊥OBOC⊥OEOD为∠BOC的平分线∠BOE=16°求∠DOE的度数.
如图OB⊥ODOC⊥OA∠BOC=32°那么∠AOD等于
148°
132°
128°
90°
已知如图OA=OCOB=OD求证△ABO≌△CDO.
已知点O.是等边△ABC内的任一点连接OAOBOC.1如图1已知∠AOB=150°∠BOC=120°
如图已知OA⊥OCOD⊥OB∠BOC=40求∠AOD的度数.
已知如图AC和BD相交于点OOA=OCOB=OD求证AB∥CD.
如图OA⊥OBOC⊥OD∠BOC=28°求∠AOD的度数
已知点O.是等边△ABC内的任一点连接OAOBOC.1如图1已知∠AOB=150°∠BOC=120°
如图已知∠BOC在平面α内OA是平面α的斜线且∠AOB=∠AOC=60°OA=OB=OC=aBC=a
如图OA⊥OCOB⊥OD且∠AOD=3∠BOC求∠BOC的度数.
已知∠AOB=60oODOE分别是∠BOC和∠COA的平分线1如图1OC在∠AOB内部时求∠DOE的
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