如图,在由边长为1的小正方形组成的网格中,三角形ABC的顶点均落在格点上.
(1)将
绕点O顺时针旋转90°后,得到
.在网格中画出
;
(2)
的正切值为______.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/26/1bba70b0-659e-4023-a442-9301f531db4a.png?resizew=162)
(1)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c20b7648091792e4b4314ea26d9a68bb.png)
更新时间:2023-08-31 15:21:15
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解答题-作图题
|
适中
(0.65)
【推荐1】如图,方格纸中的每个小方格都是边长为1个单位的正方形,
的顶点均在小正方形的顶点上.
(1)在方格纸上画出
,使
与
关于直线
对称,点
在方格纸上的顶点上;
(2)在(1)的条件下,把
绕点
顺时针旋转
得到
(点
和点
是对应点,点
和点
是对应点),点
和点
在方格纸上的顶点上,连接
,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/16/feaba9f4-0743-4ca6-83f6-7f35123584de.png?resizew=163)
(1)在方格纸上画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eb30368afe1ddd6ab11e5d0137125c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)在(1)的条件下,把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2036191be2322003aaee6bb411868327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ff7caec4fdd8fb54a3ffbff9692414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b80d32bd31d565cd7a5fa4b42dc2e040.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/033fc4ba2b9b57f04410366a6ad76069.png)
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解答题-作图题
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适中
(0.65)
【推荐2】(1)画图:图①为正方形网格,画出
绕点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
顺时针 旋转
后的图形.
(2)尺规作图:在图②中作出四边形
关于点
对称的图形(不写作法,保留作图痕迹,用黑色笔将作图痕迹涂黑).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
(2)尺规作图:在图②中作出四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2021/2/2/2649367248035840/2652180638367744/STEM/db40547da5954e6f9c9e7f40d3f3b8b7.png?resizew=476)
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解答题-证明题
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名校
【推荐1】如图,AB是⊙O的直径,C是弧AB的中点,弦CD与AB相交于E.
![](https://img.xkw.com/dksih/QBM/2019/5/31/2215388149186560/2217064087961600/STEM/12a2c5c0a1994ccc970db0803d2a1485.png?resizew=115)
(1)若∠AOD=45°,求证:CE=
ED;(2)若AE=EO,求tan∠AOD的值.
![](https://img.xkw.com/dksih/QBM/2019/5/31/2215388149186560/2217064087961600/STEM/12a2c5c0a1994ccc970db0803d2a1485.png?resizew=115)
(1)若∠AOD=45°,求证:CE=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
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解答题-问答题
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名校
【推荐2】如图,在△ABC中,AB=AC=10,以AB为直径的⊙O与BC交于点D,与AC交于点E,连OD交BE于点M,且MD=2.
![](https://img.xkw.com/dksih/QBM/2019/5/30/2214975421513728/2217716525719552/STEM/19f4e0d856dc4d1c94445bfb466a846c.png?resizew=111)
(1)求BE长;(2)求tanC的值.
![](https://img.xkw.com/dksih/QBM/2019/5/30/2214975421513728/2217716525719552/STEM/19f4e0d856dc4d1c94445bfb466a846c.png?resizew=111)
(1)求BE长;(2)求tanC的值.
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解答题-作图题
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适中
(0.65)
【推荐1】如图,在正方形网格中的每个小正方形边长都是1,每个小格的顶点叫格点,以格点为顶点的三角形叫格点三角形,请在网格中仅用无刻度直尺画图.(用虚线表示画图过程,实线表示画图结果)
中
边上的高
,并直接写出
的长;
(2)在图②中,过格点D画出
交
于F,并直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)在图②中,过格点D画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fda6d76fb350332472e76fefcca6a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
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解答题-作图题
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适中
(0.65)
【推荐2】如图是由相同边长的小正方形组成的网格图形,每个小正方形的边长为1个单位长度,每个小正方形的顶点都叫做格点,的三个顶点都在格点上,利用网格解决问题.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
(3)在网格中过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(4)在网格中过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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