如图,△ABC是等腰直角三角形,DE是过点C的直线,BD⊥DE,AE ⊥DE ,则△BDC通过下列变换能与△ACE重合的是( )
A.绕点C逆时针旋转90度 | B.沿AB的垂直平分线翻折 |
C.绕AB的中点M顺时针旋转90度 | D.沿DE方向平移 |
21-22八年级上·山东烟台·期末 查看更多[6]
山东省烟台市招远市2021-2022学年八年级上学期期末数学试题(已下线)广东省深圳市罗湖区深圳中学2021-2022学年八年级下学期期中数学试题广东省深圳市部分学校2021-2022学年八年级下学期期中数学试题(B卷)广东省深圳市部分学校2021-2022学年八年级下学期期中数学试题(A卷)(已下线)期中押题密卷01(北师大版,第1-4章)-2023-2024学年八年级数学下学期期中考点大串讲(北师大版)江西省抚州市黎川县黎川一中片区八校联考2023-2024学年八年级下学期期中数学试题
更新时间:2022-07-20 16:54:35
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【推荐1】如图,在
中,
、
分别是
、
上的点,作
,
,垂足分别为
、
,若
,
,则下列四个结论:①
平分
;②
;③
;④
,其中结论正确的的个数为( ).
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A.4 | B.3 | C.2 | D.1 |
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【推荐2】如图,在平面直角坐标系内,正方形
的顶点A,B在第二象限内,且点A,B在反比例函数
的图象上,点C在第三象限内.其中,点A的纵坐标为3,则
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/a556ec55-6949-469b-aefa-72d7124816b9.png?resizew=176)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,在
中,
,
,将
沿直线
方向平移
个单位得到
与
相交于
点,连接
,则下列结论:
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd9474a55bb1bc6994c724dcde7d4aa.png)
②
是以
为底的等腰三角形;
③
平分
;
④四边形
的面积为
.
其中正确的结论有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7281b641656a5992abaafb4190ca9afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4300aefd67369742e2b1ddcdc02dd495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d46c5ffa3e7b577ed2be01b2eab474bc.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45376f3edd89226b7ba64717d494db47.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd9474a55bb1bc6994c724dcde7d4aa.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefe4a3e7a7fa195ed6a6712447639b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aec2173fe24f9b32919f5a259411af7.png)
④四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8057131f4bae6260aaeda1eb3c77fb7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
其中正确的结论有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/9/f696bfcb-d4d4-4035-992c-564356673831.png?resizew=151)
A.4个 | B.3个 | C.2个 | D.1个 |
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【推荐2】根据图中数据可求阴影部分的面积和为( )
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A.12 | B.10 | C.8 | D.7 |
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【推荐1】下列说法正确的是( )
A.角是轴对称图形,对称轴是角的平分线 |
B.等腰三角形一边上的中线和这条边上的高重合 |
C.若两个图形关于某条直线对称,则这两个图形全等 |
D.一个锐角和一条边分别相等的两个直角三角形全等 |
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【推荐2】如图,分别以
的边
,
所在直线为对称轴作
的对称图形
和
,
,线段
与
相交于点
,连接
、
、
、
.有如下结论:①
;②
;③
平分
;④
.其中正确的结论个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/11/7150fc54-a003-4095-b9e4-564798e75323.png?resizew=207)
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A.1 | B.2 | C.3 | D.4 |
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【推荐1】如图,点
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A.1个 | B.2个 | C.3个 | D.4个 |
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A.3 | B.4 | C.![]() | D.![]() |
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