如图,直线AB、CD相交于点O,OE平分∠AOD,若∠BOC=80°,则∠AOE的度数是( )
![](https://img.xkw.com/dksih/QBM/2014/11/14/1573756202852352/1573756209012736/STEM/47ee5d6ab2274d479e22b02f114ed4fe.png)
![](https://img.xkw.com/dksih/QBM/2014/11/14/1573756202852352/1573756209012736/STEM/47ee5d6ab2274d479e22b02f114ed4fe.png)
A.40° | B.50° | C.80° | D.100° |
更新时间:2014-11-14 10:02:15
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【知识点】 初中数学综合库
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【推荐1】如图,在平面直角坐标系中,正方形
与正方形
是以原点O为位似中心的位似图形,且面积比为
,点A、B、E点在x轴上,若点D的坐标为
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,在
中,
,
,点P是线段
上的一个动点,点D是射线
上的一点,且
,作点P关于
的对称点Q,连接
,
,
.点P从点A出发向点B运动,在这过程中,线段
的长度变化情况是( )
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A.保持不变 | B.一直变大 | C.一直变小 | D.先变小再变大 |
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