如图,已知线段
于点
.
![](https://img.xkw.com/dksih/QBM/2023/5/3/3229589772124160/3231056316301312/STEM/48459ac4de0f4edb804670247adf46b3.png?resizew=217)
(1)尺规作图:在射线
上求作点
,使得
;(保留作图痕迹,不写作法)
(2)在(1)的条件下,若
为
的中点,
交
于点
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ced1cd5eac831336520de951baef21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2023/5/3/3229589772124160/3231056316301312/STEM/48459ac4de0f4edb804670247adf46b3.png?resizew=217)
(1)尺规作图:在射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7456f14cda5950725251056a4e59afe2.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c877c7a802fdbbc3150729d4d28b8e06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e811e2b1afe23a485c22c3f562408c.png)
更新时间:2023-05-05 09:43:48
|
相似题推荐
解答题-问答题
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适中
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【推荐1】如图,△ABC中,AB=AC,AB的垂直平分线DE分别交AC、AB于点D、E.
(1)若∠A=46°,求∠CBD的度数;
(2)若AB=8,△CBD周长为13,求BC的长.
(1)若∠A=46°,求∠CBD的度数;
(2)若AB=8,△CBD周长为13,求BC的长.
![](https://img.xkw.com/dksih/QBM/2017/10/16/1796523845206016/1797682852790272/STEM/844f8953d91648ae96164e198f739d94.png?resizew=83)
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解答题-作图题
|
适中
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【推荐2】已知线段
,
按如下要求作图:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/edae6926-febb-48a8-be65-3e24ffc8b4f1.png?resizew=343)
(1)作
,使得
,
;
(2)在
中,找到一点
,使得
到三角形各顶点的距离相等.(不写作法,保留作图痕迹,写出结论)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/edae6926-febb-48a8-be65-3e24ffc8b4f1.png?resizew=343)
(1)作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d59cdc4d6fa9e28e0d7ce6ea74833bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a88b719166fcc1431f876bc8c5656c.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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解答题-作图题
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名校
【推荐1】尺规作图(不写作法,保留作图痕迹):
(1)在图1中,作线段
的垂直平分线
;
(2)在图2,过点
作直线
平行于
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/10/25a649ff-59f4-4022-b7ed-a3016388d1a5.png?resizew=316)
(1)在图1中,作线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)在图2,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
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解答题-作图题
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【推荐2】如图,在
中,
平分
.
![](https://img.xkw.com/dksih/QBM/2020/3/7/2421474918768640/2422335057821696/STEM/6d837ba1d9ed43d183bd8d408a02f06e.png?resizew=109)
(1)尺规作图(不写作法,保留作图痕迹),作
的垂真平分线
,与
相交于点
,与
相交于点
;
(2)在(1)条件下,连接
,
,
和
有何数量关系?并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://img.xkw.com/dksih/QBM/2020/3/7/2421474918768640/2422335057821696/STEM/6d837ba1d9ed43d183bd8d408a02f06e.png?resizew=109)
(1)尺规作图(不写作法,保留作图痕迹),作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39addc1173a458af87ed5c5e3f06466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(2)在(1)条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec412ebd940d71b983ce4877e3401ee.png)
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解答题-问答题
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【推荐1】如图,四边形
是菱形中,对角线
与
相交于O,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f25936291abb6432ed5a710ebf0ea195.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f769d040ba926b022c56960e1b2677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
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【推荐2】如图,直线y=
x﹣3交x轴于A,交y轴于B,
(1)求A,B的坐标和AB的长(直接写出答案);
(2)点C是y轴上一点,若AC=BC,求点C的坐标;
(3)点D是x轴上一点,∠BAO=2∠DBO,求点D的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
(1)求A,B的坐标和AB的长(直接写出答案);
(2)点C是y轴上一点,若AC=BC,求点C的坐标;
(3)点D是x轴上一点,∠BAO=2∠DBO,求点D的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/8beb7b53-38aa-487b-a214-9bae6939556c.png?resizew=174)
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解答题-问答题
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【推荐1】教育部基础教育司负责人解读“2020新中考”时强调要注重学生分析与解决问题的能力,要增强学生的创新精神和综合素质.王老师想尝试改变教学方法,将以往教会学生做题改为引导学生会学习.于是她在菱形的学习中,引导同学们解决菱形中的一个问题时,采用了以下过程(请解决王老师提出的问题):
![](https://img.xkw.com/dksih/QBM/2020/2/15/2399781265801216/2400349723901952/STEM/fa2163fd840a45e89f601654a9253106.png?resizew=346)
先出示问题(1):如图1,在等边三角形
中,
为
上一点,
为
上一点,如果
,连接
、
,
、
相交于点
,求
的度数.
通过学习,王老师请同学们说说自己的收获.小明说发现一个结论:在这个等边三角形
中,只要满足
,则
的度数就是一个定值,不会发生改变.紧接着王老师出示了问题(2):如图2,在菱形
中,
,
为
上一点,
为
上一点,
,连接
、
,
、
相交于点
,如果
,
,求出菱形的边长.
问题(3):通过以上的学习请写出你得到的启示(一条即可).
![](https://img.xkw.com/dksih/QBM/2020/2/15/2399781265801216/2400349723901952/STEM/fa2163fd840a45e89f601654a9253106.png?resizew=346)
先出示问题(1):如图1,在等边三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/421291381be28da4bd16560fd383b4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ffcf0b442d5ff2ce8efa1a778b4ecd6.png)
通过学习,王老师请同学们说说自己的收获.小明说发现一个结论:在这个等边三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ffcf0b442d5ff2ce8efa1a778b4ecd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f0a3f78d51f10acd0e87c124c96a15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638d9cccb679214718224c3088ed4a10.png)
问题(3):通过以上的学习请写出你得到的启示(一条即可).
您最近一年使用:0次
解答题-问答题
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【推荐2】已知:如图,
是边长为
的等边三角形,动点
、
同时从
、
两点出发,分别沿
、
方向匀速移动,它们的速度都是
,当点
到达点
时,
、
两点停止运动.设点
的运动时间为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
,解答下列问题:
![](https://img.xkw.com/dksih/QBM/2023/7/20/3284891475263488/3285600110354432/STEM/dad7cec50fd848adb8b97b925b229d31.png?resizew=114)
(1)当
为何值时,
是直角三角形?
(2)是否存在某一时刻
,使得四边形
的面积是
面积的
?如果存在,求出相应的
值;如果不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74d2dfdcbe7861144b53422f96affa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50fc81a8fc66a12d20315dc7e83b069d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de626c8da21a60e4d02a123d23e0b06.png)
![](https://img.xkw.com/dksih/QBM/2023/7/20/3284891475263488/3285600110354432/STEM/dad7cec50fd848adb8b97b925b229d31.png?resizew=114)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c495b8fd7f7bb21c177c9d50fbf6919.png)
(2)是否存在某一时刻
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c5b62ea69808e36e57db3cf2583f118.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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