如图,在正方形
中,线段
为对角线,点
分别为边
和
上的点且
,连接
,过点
作
交
于点
,点
为边
上一点,连接
且
.若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c13ab7f17263c4e6163d960f1c5060.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd495843817029d40bd4064f738a332f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/492db64ee769c91734f5022e40a8263f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb3d3ec03bd07ef184d26105cb3efc37.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-05-12 18:59:38
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【推荐1】如图,方格纸中有四个相同的正方形,则∠1+∠2+∠3为( )
![](https://img.xkw.com/dksih/QBM/2015/3/2/1573804748652544/1573804754739200/STEM/8712dfe320ed44a3ab69e5c05b26a6e9.png?resizew=102)
![](https://img.xkw.com/dksih/QBM/2015/3/2/1573804748652544/1573804754739200/STEM/8712dfe320ed44a3ab69e5c05b26a6e9.png?resizew=102)
A.90° | B.120° | C.135° | D.150° |
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【推荐2】如图,正方形ABCD中,AB=6,点E在边CD上,且CD=3DE,将△ADE沿AE对折至△AFE,延长EF交边BC于点G,连结AG、CF,下列结论:
①△ABG≌△AFG;② BG=GC;③ AG∥CF;④∠GAE=45°.
则正确结论的个数有( )
![](https://img.xkw.com/dksih/QBM/2019/3/26/2168998896140288/2171179288666112/STEM/48003fe128544ac2a389088ae768990c.png?resizew=138)
①△ABG≌△AFG;② BG=GC;③ AG∥CF;④∠GAE=45°.
则正确结论的个数有( )
![](https://img.xkw.com/dksih/QBM/2019/3/26/2168998896140288/2171179288666112/STEM/48003fe128544ac2a389088ae768990c.png?resizew=138)
A.1 | B.2 | C.3 | D.4 |
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【推荐1】已知:如图,直线l和直线l外一点A,求作:过点A与直线l平行的直线.(尺规作图)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/28/9d7c2fde-4fc5-487a-aa27-2747278d8b0d.png?resizew=237)
甲的作法是:
(1)在直线l上分别取B、C两点(点B在点C的左边);
(2)以点A为圆心,以BC为半径画弧;再以点C为圆心,以AB为半径画弧,两弧交于点D(点B、点D在直线AC的两侧)
(3)作直线AD,则直线AD即为所求.
乙的作法:
(1)在直线l上分别取B、C两点(点B在点C的左边);
(2)连接BA并延长,在射线BA上截取
;
(3)连接DC,作线段DC的垂直平分线交DC于点E;
(4)作直线AE,则直线AE即为所求.则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/28/9d7c2fde-4fc5-487a-aa27-2747278d8b0d.png?resizew=237)
甲的作法是:
(1)在直线l上分别取B、C两点(点B在点C的左边);
(2)以点A为圆心,以BC为半径画弧;再以点C为圆心,以AB为半径画弧,两弧交于点D(点B、点D在直线AC的两侧)
(3)作直线AD,则直线AD即为所求.
乙的作法:
(1)在直线l上分别取B、C两点(点B在点C的左边);
(2)连接BA并延长,在射线BA上截取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ddd49625097d0a78df7170be4f882e.png)
(3)连接DC,作线段DC的垂直平分线交DC于点E;
(4)作直线AE,则直线AE即为所求.则下列说法正确的是( )
A.甲对乙错 | B.甲错乙对 | C.甲乙都错 | D.甲乙都对 |
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【推荐2】如图,在
中,
,
为锐角,
是对角线
的中点.某数学学习小组要在
上找两点
,使四边形
为平行四边形,现总结出如下甲、乙、丙三种方案:甲:分别取
的中点
,乙:作
分别平分
,丙:分别作
垂直
于点
.
其中所有正确的方案是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b9199a3de404cb13ae7710f73db5c8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a373959bb9026f8a09845c0b828bf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910936ec9fb419d51ce2f5ea817f8401.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08be58683fe1c6eb336c79f698dc3dbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851ab1aa713a2d1c21e886c8acd3f0d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d7133a26c730e7c7e63d490e0c25067.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851ab1aa713a2d1c21e886c8acd3f0d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/27/e38bfe38-8d3f-4a24-b66c-58a9feec700c.png?resizew=406)
其中所有正确的方案是( )
A.仅甲 | B.仅甲、乙 | C.仅乙、丙 | D.甲、乙、丙 |
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【推荐1】如图,半径为10的扇形
中,
,
为弧
上一点,
,
,垂足分别为
,
.若
,则图中阴影部分的面积为( )
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897977223938048/2914691619176448/STEM/5ccedeca-88ab-4e62-968d-986b74223d47.png?resizew=139)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/affbe2d2ced2303d8c3d183746d0bcf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c84a7cd47edd57011a3816f7180995b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69d493d672f9d54790afd1bffd352ac1.png)
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897977223938048/2914691619176448/STEM/5ccedeca-88ab-4e62-968d-986b74223d47.png?resizew=139)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,四边形ABCD为矩形,依据尺规作图的痕迹,∠α与∠β的度数之间的关系为( )
A.β= 180-α | B.β=180°-![]() | C.β=90°-α | D.β=90°-![]() |
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【推荐1】如图,在正方形ABCD中,N为边AD上一点,连接BN.过点A作AP⊥BN于点P,连接CP,M为边AB上一点,连接PM,∠PMA=∠PCB,连接CM,有以下结论:①△PAM∽△PBC;②PM⊥PC;③M、P、C、B四点共圆;④AN=AM.其中正确的个数为( )
![](https://img.xkw.com/dksih/QBM/2020/1/15/2377427284451328/2378196631371776/STEM/590511f82c5c4fd5b5faec48e195207a.png?resizew=129)
![](https://img.xkw.com/dksih/QBM/2020/1/15/2377427284451328/2378196631371776/STEM/590511f82c5c4fd5b5faec48e195207a.png?resizew=129)
A.4 | B.3 | C.2 | D.1 |
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【推荐2】如图,在平面直角坐标系中,正方形
的顶点
在坐标原点,点
的坐标为
,点
在第二象限,反比例函数
不的图象经过点
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/607543bb9f55b8a141ed2d6cf0e1a20b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3247f03357462fec934f37c65ebdc77e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/18/31781e08-a266-41f5-b6cd-7aca8ba9eb0b.png?resizew=222)
A.-2 | B.-3 | C.-4 | D.4 |
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