如图1,已知点P(2, 2),点A在x轴正半轴上运动,点B在y轴负半轴上运动,且PAPB.
![](https://img.xkw.com/dksih/QBM/2022/5/11/2977073282555904/2980894703206400/STEM/9d824505-ecec-42c9-b0ad-9d0dc896e1b3.png?resizew=426)
(1)求证:PA⊥PB;
(2)若点A(8, 0),请直接写出B的坐标并求出OAOB的值;
(3)如图2,若点B在y轴正半轴上运动,其他条件不变,请直接写出OAOB的值.
![](https://img.xkw.com/dksih/QBM/2022/5/11/2977073282555904/2980894703206400/STEM/9d824505-ecec-42c9-b0ad-9d0dc896e1b3.png?resizew=426)
(1)求证:PA⊥PB;
(2)若点A(8, 0),请直接写出B的坐标并求出OAOB的值;
(3)如图2,若点B在y轴正半轴上运动,其他条件不变,请直接写出OAOB的值.
更新时间:2022-05-16 23:08:42
|
相似题推荐
解答题-问答题
|
较易
(0.85)
【推荐1】如图,在坐标平面内,正方形
的顶点坐标分别为
、
.
__________;
(2)求顶点A的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7c65a12b8150d8f47ed9a67a5ea31d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/409c9c4f0f2c75e2291a5df49c01106b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
(2)求顶点A的坐标.
您最近一年使用:0次
解答题-作图题
|
较易
(0.85)
【推荐2】如图,已知在平面直角坐标系中,△ABC三个顶点的坐标分别是A(1,1),B(4,2),C(3,4).
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897032556232704/2973551319736320/STEM/d2e3a63f46cd42f6a9ae0bf286ef54e0.png?resizew=175)
(1)画出△ABC关于y轴对称的
(要求:A与
,B与
,C与
相对应);
(2)写出点
,
,
的坐标;
(3)求
的面积.
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897032556232704/2973551319736320/STEM/d2e3a63f46cd42f6a9ae0bf286ef54e0.png?resizew=175)
(1)画出△ABC关于y轴对称的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)写出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24414f4f8d6af6e0aa1425b634473d2d.png)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐1】如图,已知AB=CD,AE⊥BC,DF⊥BC,垂足分别为E,F,CE=BF,求证:CD∥AB.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/232a6f53-0695-40bb-8ee9-c7110fe1096d.png?resizew=154)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】如图,在△ABC中,点D是BC上一点,且AD=AB,AE//BC,∠BAD=∠CAE,连接DE交AC于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/4/37e7b733-4092-48a4-af7c-aaa1b55b6ad9.png?resizew=203)
(1)若∠B=70°,求∠C的度数;
(2)若AE=AC=4,AB=3,求△ADF的周长
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/4/37e7b733-4092-48a4-af7c-aaa1b55b6ad9.png?resizew=203)
(1)若∠B=70°,求∠C的度数;
(2)若AE=AC=4,AB=3,求△ADF的周长
您最近一年使用:0次