如图,在
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/9325761e-cce5-4a74-91bd-9c6b7b5192de.png?resizew=191)
(1)请用无刻度的直尺和圆规作出
中
的平分线,交
于点
.(要求:不写作法,保留作图痕迹)
(2)在(1)的条件下,求点
到
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d649afbddd907f0dfec1420f02f82fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/9325761e-cce5-4a74-91bd-9c6b7b5192de.png?resizew=191)
(1)请用无刻度的直尺和圆规作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.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,求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
更新时间:2022-12-10 17:37:43
|
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,∠MON=90°,点A、B 分别在射线OM、ON上,点C在∠MON内部.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/18/e909a09f-ec65-499c-bcb0-44161a6dc6e0.png?resizew=427)
(1)若OA=OB,
①如图1,若CA⊥OM,CB⊥ON,求证:CA=CB.
②如图2,若∠ACB=90°,求证:OC平分∠ACB.
(2)如图3,点A、B 分别在射线OM、ON上运动,点C随之运动,且∠ACB=90°,AC=BC,P为OM上一定点,当点C运动到何处时,PC的长度最短?请用尺规作图作出PC最短时C点的位置(保留作图痕迹,不要写作法),并请简要说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/18/e909a09f-ec65-499c-bcb0-44161a6dc6e0.png?resizew=427)
(1)若OA=OB,
①如图1,若CA⊥OM,CB⊥ON,求证:CA=CB.
②如图2,若∠ACB=90°,求证:OC平分∠ACB.
(2)如图3,点A、B 分别在射线OM、ON上运动,点C随之运动,且∠ACB=90°,AC=BC,P为OM上一定点,当点C运动到何处时,PC的长度最短?请用尺规作图作出PC最短时C点的位置(保留作图痕迹,不要写作法),并请简要说明理由.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】在四边形
中,
.
,点
、
分别在边
、
上,且
平分
.
平分
;
(2)若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2ee75a234ac05a3225e49ddd8c5065.png)
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eee296a7d9fba487f1485c61580196f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e31edc5b71c488ca9942d70d9298f01.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】已知:如图,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/a06b1286-0d26-4e7b-9597-3cea1fe03fd2.png?resizew=132)
(1)请用直尺和圆规,按以下要求作图(保留作图痕迹).
作法:
①作
平分
交
于点
;
②作线段
的垂直平分线分别交
于点
,交
于点
;
③连接
;
(2)在(1)所作的图中,试判断四边形
的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/a06b1286-0d26-4e7b-9597-3cea1fe03fd2.png?resizew=132)
(1)请用直尺和圆规,按以下要求作图(保留作图痕迹).
作法:
①作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
②作线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
③连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c818110255bdad691f61be6461a6fd73.png)
(2)在(1)所作的图中,试判断四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48a61d8bedef61745ee4fd89a8c0c119.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
名校
【推荐2】如图,在△ABC中.
![](https://img.xkw.com/dksih/QBM/2022/5/21/2984105028403200/2985597910827008/STEM/b85da9cf-4938-407b-92d0-902fa4e67f50.png?resizew=216)
(1)作△ABC的角平分线BE,交AC于点E;(尺规作图,保留作图痕迹,不写作图过程)
(2)在线段AB上截取BD,使得BD=DE,求证:DE
BC.
![](https://img.xkw.com/dksih/QBM/2022/5/21/2984105028403200/2985597910827008/STEM/b85da9cf-4938-407b-92d0-902fa4e67f50.png?resizew=216)
(1)作△ABC的角平分线BE,交AC于点E;(尺规作图,保留作图痕迹,不写作图过程)
(2)在线段AB上截取BD,使得BD=DE,求证:DE
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
您最近一年使用:0次