如图,在四边形
中,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/86238e16-0979-4963-8cb9-992f1dc45282.png?resizew=178)
(1)利用尺规作
的平分线
,交边
于点E,连接
.(要求:保留作图痕迹,不写作法,标明字母)
(2)在(1)的条件下,求证:四边形
是菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/86238e16-0979-4963-8cb9-992f1dc45282.png?resizew=178)
(1)利用尺规作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)在(1)的条件下,求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d70676406f26d339465fe3473c0c05.png)
更新时间:2023-12-12 17:21:17
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】在正方形
中,
绕点A顺时针旋转,它的两边分别交
、
(或它们的延长线)于点
.
(1)如果
在如图1所示的位置时,写出线段
之间的数量关系,并证明你的结论.
(2)请问当
绕点A旋转到如图2所示的位置时,线段
和
之间又有怎样的数量关系?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2a882372eed95410391e06a1da7046.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/89b8c951-e183-4479-8ff7-6dc38d2d2c84.png?resizew=282)
(1)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358c69b4f6c350c35d19d33c69f2a2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29abbd467e24a5e949c42485ad1e3ab9.png)
(2)请问当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358c69b4f6c350c35d19d33c69f2a2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7decb1c197f855d08f2f9078b34d047.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在正方形
中,
为对角线
上一点
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/27f8e9ce-bd78-470b-aa20-89ffa45da1f7.png?resizew=157)
(1)求证:
;
(2)过点
作
交
于点
,延长
至点
使
,连接
.
①依题意补全图形;
②用等式表示
与
之间的数量关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6503cd2281ad9a6a7ce04cb928bd74cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3fd5f76e300dbdde52b64657c129bf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/27f8e9ce-bd78-470b-aa20-89ffa45da1f7.png?resizew=157)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad957ffa2088c5947e4dc80b4be19885.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/712a5322a40e644d628fb12996a57294.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d17102744dbe80426d5fcd50416f3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
①依题意补全图形;
②用等式表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
名校
【推荐1】我们定义:顶角等于36°的等腰三角形为黄金三角形.如图,△ABC中,AB=AC且∠A=36°,则△ABC为黄金三角形.
![](https://img.xkw.com/dksih/QBM/2022/1/14/2894083274055680/2918450942492672/STEM/57ccc1c6-51be-406d-a6ac-abd627f7f24d.png?resizew=152)
(1)尺规作图:作∠B的角平分线,交AC于点D.(保留作图痕迹,不写作法).
(2)请判断△BDC是否为黄金三角形,如果是,请给出证明,如果不是,请说明理由.
![](https://img.xkw.com/dksih/QBM/2022/1/14/2894083274055680/2918450942492672/STEM/57ccc1c6-51be-406d-a6ac-abd627f7f24d.png?resizew=152)
(1)尺规作图:作∠B的角平分线,交AC于点D.(保留作图痕迹,不写作法).
(2)请判断△BDC是否为黄金三角形,如果是,请给出证明,如果不是,请说明理由.
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】在
中,
.用尺规作图完成如下操作,保留作图痕迹.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/0fbc1a90-09a7-4542-a8cd-b01602c7e0a3.png?resizew=83)
(1)作
的角平分线
交
边于点D;
(2)在
上求作一点P,使得
;
(3)线段
之间的数量关系________.
(4)若
的度数是_________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab41054fa9ce51b68e78d9c0cf398d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/0fbc1a90-09a7-4542-a8cd-b01602c7e0a3.png?resizew=83)
(1)作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e5641c2b9c38884498a4e85778c012.png)
(3)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f279ddc3af0162ce0f87489cb226f8b1.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2aebc20c61d0127ed37e62a32f31b9d.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,四边形ABCD是
的内接四边形,AC平分
,点B是弧AC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/da250287-572f-4497-b842-a7da02e0adfa.png?resizew=147)
(1)求证:
.
(2)如下图,连接BO并延长分别交AC,AD于点E和F,交
于点G,连接FC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/f3ce2146-f6a6-4c25-99e6-a47c11cd5efd.png?resizew=151)
①试判断四边形ABCF的形状,并说明理由.
②
,
,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/da250287-572f-4497-b842-a7da02e0adfa.png?resizew=147)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
(2)如下图,连接BO并延长分别交AC,AD于点E和F,交
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/f3ce2146-f6a6-4c25-99e6-a47c11cd5efd.png?resizew=151)
①试判断四边形ABCF的形状,并说明理由.
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8620f7b3557d58b1bd7b77b525684742.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62b2e24adc4473e9e5e797acd5c1141f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,已知矩形ABCD,分别在边AD,BC上找一点E和F,使四边形DEBF是菱形.
![](https://img.xkw.com/dksih/QBM/2021/3/28/2687866455187456/2688169462136832/STEM/6e945a1e-1bf7-468e-874d-ad1f23e3742f.png)
您最近一年使用:0次