如图,
中,
,
,将
绕点A逆时针旋转
得到
,连接
,若
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0f5353b4b4a463dffcef43db49ff3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab926d89b65f26c12e3da73ef1e5cf68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/498b16b4-1813-4d57-aed7-d69af6e2909d.png?resizew=172)
22-23九年级上·北京·期末 查看更多[3]
北京市燕山地区2022-2023学年九年级上学期期末质量监测数学试卷(已下线)专题9.1 图形的旋转(知识讲解)-2022-2023学年八年级数学下册基础知识专项讲练(苏科版)(已下线)专题3.5 图形的旋转(知识讲解)-2022-2023学年八年级数学下册基础知识专项讲练(北师大版)
更新时间:2022-12-28 20:52:53
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解答题-问答题
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(0.85)
【推荐1】如图,
、
、
三点在同一水平线上,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2023/4/25/3224356034347008/3224734530158592/STEM/72d4e210f9ac4454b34e376f67f32bd4.png?resizew=132)
(1)求
的度数;
(2)求线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4ab7e657f01bdfa235f8c4d6681d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d35d8d8bb0dc17f2f86fe5b230a2b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35b30bca5d706eb899b4a5479fa3dca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b3f267eee935183f708c4a68204718.png)
![](https://img.xkw.com/dksih/QBM/2023/4/25/3224356034347008/3224734530158592/STEM/72d4e210f9ac4454b34e376f67f32bd4.png?resizew=132)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
(2)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
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解答题-作图题
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【推荐2】如图,在
中,
.
(1)用直尺和圆规在边
上找一点P,使得点P到点A,B的距离相等(保留作图痕迹,不写作法);
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/29/74b2b946-9a0d-43af-b49d-f6af6c9a357f.png?resizew=163)
(1)用直尺和圆规在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e918b70b02a73685e3c536c7f380e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ec69c860bae7cc35f604a0f11e80f5.png)
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解答题-问答题
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(0.85)
【推荐1】如图,在矩形
中,
,
,点E在边
上,
,点F在边
上,连接
,
,当
的长为多少时,
与
相似.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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解答题-作图题
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【推荐1】如图,正方形网格中,每个小正方形的边长都是一个单位长度,△ABC在平面直角坐标系中的位置如图所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/30/5618145d-421a-4062-9542-c36e207155fe.png?resizew=262)
(1)画出△ABC关于y轴对称的△A1B1C1;
(2)画出将△ABC绕点O顺时针方向旋转90°得到的△A2B2C2;
(3)求出△A2B2C2的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/30/5618145d-421a-4062-9542-c36e207155fe.png?resizew=262)
(1)画出△ABC关于y轴对称的△A1B1C1;
(2)画出将△ABC绕点O顺时针方向旋转90°得到的△A2B2C2;
(3)求出△A2B2C2的面积.
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解答题-作图题
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【推荐2】直线y=2x+2与x轴、y轴分别交于A、B两点,将△AOB绕点O顺时针旋转900,得到△A1OB1 .
(1)在图中画出△A1OB1;
(2)求经过A,A1,B1三点的抛物线的解析式.
(1)在图中画出△A1OB1;
(2)求经过A,A1,B1三点的抛物线的解析式.
![](https://img.xkw.com/dksih/QBM/2015/1/7/1573782785359872/1573782791643136/STEM/60d3651c47fe4ec29c216396399f9588.png)
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