如图,在平面直角坐标系中,点
的坐标为
,以线段
为边,在第四象限内作等边三角形
,点
为
轴正半轴上一动点
,连接
,以线段
为边在第四象限内作等边三角形
,连接
并延长,交
轴于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/30/51cb50ca-778c-4910-a5e4-693444d1e84d.png?resizew=259)
(1)求证:
;
(2)在点
的运动过程中,
的度数是否会变化?如果变化,请说明理由,如果不变,请求出
的度数;
(3)当点
运动到什么位置时,以
、
、
为顶点的三角形是等腰三角形?并直接写出此时点
的横坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a73a8a991eb12b8a916d6207c901e0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/571f8dfb1eb003438f27bab2324140ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a2010d8ed212e7afd14b8613a4b8a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e04a5b59cced25ab7057d03fe3c0ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f96461af9193d5d7867ddf8fcbefcaec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/30/51cb50ca-778c-4910-a5e4-693444d1e84d.png?resizew=259)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fba764e8ed096e13d16a9cc8a1caf3.png)
(2)在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5655850c041e37b37f3a1b5b473bed15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5655850c041e37b37f3a1b5b473bed15.png)
(3)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
更新时间:2024-01-30 11:38:30
|
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,这是某县的部分平面简图.
(1)请在图上建立适当的平面直角坐标系,并分别写出宾馆、文化宫、医院的坐标;
(2)在(1)的条件下,如果把人的行走看作平移,某人从医院出发,先向右平移4个单位长度,再向下平移1个单位长度到达超市,请在图上标出超市的位置,并写出它的坐标;
(3)顺次连接表示宾馆、文化宫、医院、超市的点成为一个封闭图形,并求这个图形的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/14/7ebe3452-d992-4903-8d40-149e2f59db2b.png?resizew=246)
(1)请在图上建立适当的平面直角坐标系,并分别写出宾馆、文化宫、医院的坐标;
(2)在(1)的条件下,如果把人的行走看作平移,某人从医院出发,先向右平移4个单位长度,再向下平移1个单位长度到达超市,请在图上标出超市的位置,并写出它的坐标;
(3)顺次连接表示宾馆、文化宫、医院、超市的点成为一个封闭图形,并求这个图形的面积.
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名校
【推荐2】已知y﹣2与x成正比例,当x=2时,y=6.
(1)求y与x之间的函数解析式.
(2)在所给直角坐标系中画出函数图象.
(3)此函数图象与x轴交于点A,与y轴交于点B,点C在x轴上,若S△ABC=3,请直接写出点C的坐标.
(1)求y与x之间的函数解析式.
(2)在所给直角坐标系中画出函数图象.
(3)此函数图象与x轴交于点A,与y轴交于点B,点C在x轴上,若S△ABC=3,请直接写出点C的坐标.
![](https://img.xkw.com/dksih/QBM/2020/6/4/2477225593733120/2477672333844480/STEM/f34970d0-3a88-44ca-af59-52228e1ef680.png?resizew=228)
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【推荐1】如图,在平面直角坐标系中,点
为坐标原点,直线
与
轴交于点
,与
轴交于点
,过点
作
交
轴于点
.
的坐标;
(2)点
为线段
的中点,点
为线段
的延长线上一点,连接
,设点
的横坐标为
的面积为
,求
与
之间的函数关系式(不要求写出自变量
的取值范围);
(3)在(2)的条件下,过点
作
,垂足为点
,点
为线段
的中点,连接
,且
.过点
作
交
轴于点
,点
在线段
上,连接
,过点
作
交
轴于点
,连接
,若
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a26b2198a39074c531d61af991df45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af620f6d204d310d8e3f267fdd6c3f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)点
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6d4ae39daff6d6a6e6d0887fd188aa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)在(2)的条件下,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a7a3dc3f3a02f4400e22dec2f2fee23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46fa9583b6ed479a457ee977b6e0d775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b73c1b6e4570d5edd9ef4cf31f55c91e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24e58b288762a85992af63ca1db555a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fef07f0d0807997f0b16b984ce4e9bf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26590870009f494483d3a83899203169.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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解答题-证明题
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(0.65)
【推荐2】教材呈现:下图是华师版八年级上册数学教材第96页的部分内容.
![](https://img.xkw.com/dksih/QBM/2019/11/18/2336582035824640/2337284362584064/STEM/233ce9ba915d4892a9d76f42ec3dfbb9.png?resizew=503)
请根据教材中的分析,结合图①,写出“角平分线的性质定理”完整的证明过程.
定理应用:
如图②,在四边形
中,
,点
在边
上.
平分
,
平分
.
![](https://img.xkw.com/dksih/QBM/2019/11/18/2336582035824640/2337284362584064/STEM/53954f7358354d0aac1a59f3b0d017d6.png?resizew=235)
求证:
.
![](https://img.xkw.com/dksih/QBM/2019/11/18/2336582035824640/2337284362584064/STEM/233ce9ba915d4892a9d76f42ec3dfbb9.png?resizew=503)
请根据教材中的分析,结合图①,写出“角平分线的性质定理”完整的证明过程.
定理应用:
如图②,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://img.xkw.com/dksih/QBM/2019/11/18/2336582035824640/2337284362584064/STEM/53954f7358354d0aac1a59f3b0d017d6.png?resizew=235)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a702c324e0c76150540c3d32df802077.png)
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【推荐1】已知正方形ABCD中,AB=3,且E为CD上的一动点,以AE为边做正方形AGFE,如下图1所示,连接BE、GD
(1)求证:BE=GD.
(2)如图2,延长GD、BE交于点Q,求证:BE⊥GD.
(3)若∠QED=60°,则DE的值是多少?
(1)求证:BE=GD.
(2)如图2,延长GD、BE交于点Q,求证:BE⊥GD.
(3)若∠QED=60°,则DE的值是多少?
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/1/c2293d27-8334-422f-9e17-94b0a05fdb2d.png?resizew=269)
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【推荐2】在
和
中,
,
,
,
绕点O顺时针旋转,连接
,如果它们相交,则交点为M.
(1)如图1,当点C位于
的延长线上时,求证:
;
(2)如图2,在
旋转过程中,试确定线段
和
的位置关系并说明理由;
(3)连接
,当
,且点C与点M重合时,求
与
之间存在的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e909b44f49fb2d1cacd9ffb78b30b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fca3734de79f7f50b552ef62b29dc7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cbad6599796efc1c177ae9349feda9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d3c378b1118d331d30b63fc587b270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9a6eeeebf3cff569578d7366b755aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d0b0b7d07ac1aebab6b6f1e8c6acdc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/7/e805cb4d-7202-4a21-81bf-09abfd324290.jpg?resizew=472)
(1)如图1,当点C位于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7de966c316db1013defc56372fcf814e.png)
(2)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9a6eeeebf3cff569578d7366b755aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
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解答题-作图题
|
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【推荐1】如图,在网格中,每一个小三角形都是边长为1个单位长度的正三角形,
是网格中的格点三角形,点
为格点.
绕点
顺时针旋转
得到
,请作出![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)以点
为位似中心,把
放大2倍,得到
,请作出
;
(3)求
的值是______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)以点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828dc8dc7259c510b6d63abf40f60e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828dc8dc7259c510b6d63abf40f60e90.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd01722c6f4bf06ae7d753938e5b8bc.png)
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解答题-问答题
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适中
(0.65)
【推荐2】如图,在等边三角形
中,
是
的中点,延长
到点
,使
,
.
求
的长;
(2)
吗?为什么?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90245daadce4a784a507430a3d07ddfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7909220d1db380634534190b662ee0a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a3a3d168a18401e47576f70a692e87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50c72171ccd9796fbb7b493a2d927a39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c59076e80b15755ef630fd5f40d1f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2adde816ecd1859a27fc368f171889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6508b2c7e8555700c4e8fa441a3db2de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53d7a9045b1478397816ca248377a3af.png)
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