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如图K-15-4，点A，B，C是⊙O上的三点，且四边形ABCO是平行四边形，OF⊥OC交⊙O于点F，则∠BAF等于（ ）
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教案备课库《课时作业（十五）[27.1 3.圆周角]》真题及答案
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如图点ABC是圆O上的三点且四边形ABCO是平行四边形OF⊥OC交圆O于点F则∠BAF等于
@B.C是圆O上的三点，且四边形ABCO是平行四边形，OF⊥OC交圆O于点F，则∠BAF等于（ ）
A．12.5° B．15°
20°
22.5°
定义数学活动课上乐老师给出如下定义有一组对边相等而另一组对边不相等的凸四边形叫做对等四边形.理解1如
定义数学活动课上乐老师给出如下定义有一组对边相等而另一组对边不相等的凸四边形叫做对等四边形.理解1如
阅读理解如图1在四边形ABCD的边AB上任取一点E点E不与点A点B重合分别连接EDEC可以把四边形A
阅读理解如图1在四边形ABCD的边AB上任取一点E点E不与点A.点B重合分别连接EDEC可以把四边形
若一个四边形的一条对角线把四边形分成两个等腰三角形且其中一个等腰三角形的底角是另一个等腰三角形底角的
定义数学活动课上乐老师给出如下定义有一组对边相等而另一组对边不相等的凸四边形叫做对等四边形.理解1如
如图点
B.C.是圆O.上的三点，且四边形ABCO是平行四边形，OF⊥OC交圆O.于点F.，则∠BAF等于( ) A.12.5°
15°
20°
22.5°
如图点A.B.C.是圆O.上的三点且四边形ABCO是平行四边形OF⊥OC交圆O.于点F.则∠BAF=
如图已知凸四边形ABCD的顶点在一个圆周上另一个圆的圆心O.在AB上且与四边形ABCD的其余三边相切
定义数学活动课上乐老师给出如下定义有一组对边相等而另一组对边不相等的凸四边形叫做对等四边形.理解1如
阅读理解如图1在四边形ABCD的边AB上任取一点E.点E.不与点A.点B.重合分别连接EDEC可以把
阅读理解如图1在四边形ABCD的边AB上任取一点E.点E.不与点A.点B重合分别连接EDEC可以把四
如图点ABC是⊙O上的三点且四边形ABCO是平行四边形OF⊥OC交⊙O于点F则∠BAF等于
@B.C是⊙O上的三点，且四边形ABCO是平行四边形，OF⊥OC交⊙O于点F，则∠BAF等于（ ）
A．22.5° B．20°
15°
12.5°
如图点
B.C.是圆O.上的三点，且四边形ABCO是平行四边形，OF⊥OC交圆O.于点F.，则∠BAF等于（ ）
A.12.5°
15°
20°
22.5°
阅读理解如图1在四边形ABCD的边AB上任取一点E.点E.不与点A.点B.重合分别连接EDEC可以把
定义数学活动课上乐老师给出如下定义有一组对边相等而另一组对边不相等的凸四边形叫做对等四边形.理解1如
如图AC是⊙O的直径四边形ABCD是平行四边形ADBC分别交⊙O于点FE连接AECF.1试判断四边形
如图①在四边形ABCD的边AB上任取一点E.点E.不与点A.点B.重合分别连接EDEC可以把四边形A
如图点
B.C.是圆O.上的三点，且四边形ABCO是平行四边形，OF⊥OC交圆O.于点F.，则∠BAF等于（ ）
A.12.5°
15°
20°
22.5°
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A.12.5° 15° 20° 22.5°
A.12.5° 15° 20° 22.5°
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