如图,CD是⊙O的直径,弦AB⊥CD,垂足为M,若CM=8,DM=12,则AB等于( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/3478d792-7ab9-4ba6-8b61-bdf14cd8339e.png?resizew=152)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/3478d792-7ab9-4ba6-8b61-bdf14cd8339e.png?resizew=152)
A.4![]() | B.8![]() | C.8![]() | D.4![]() |
更新时间:2018-04-04 22:20:07
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【推荐1】如图,矩形ABCD中,AB=14,AD=8,点E是CD的中点,DG平分∠ADC交AB于点G,过点A作AF⊥DG于点F,连接EF,则EF的长为( )
![](https://img.xkw.com/dksih/QBM/2020/3/15/2420277687361536/2421028017586176/STEM/34158462b24c42cbac7da81e920c0c48.png?resizew=180)
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A.3 | B.4 | C.5 | D.6 |
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【推荐2】如图,在长方形ABCD中,
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,点E在AB上,点F在BC上.若
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,在直角坐标系中,直线
交x轴于点B,交y轴于点A,以坐标原点O为圆心,以
为半径作⊙O交直线
于点C,则
的值( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/81ae0948-88b8-41c7-b073-ec90c950b131.png?resizew=148)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/81ae0948-88b8-41c7-b073-ec90c950b131.png?resizew=148)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,AB为⊙O的直径,半径OA的垂直平分线交⊙O于点C,D,P为优弧ABC上一点,则∠APC=( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/3a270fd8-7b60-4f6e-afb0-398851ffd200.png?resizew=129)
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A.20° | B.30° | C.35° | D.40° |
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