如图1,
为等边三角形,
,点D从B点出发,以每秒1个单位长度沿着
运动到A点停止,作
交直线
于E,设
,点D的运动时间为t.
(2)在图2的平面直角坐标系中画出y的图象,并写出函数y的一条性质;
(3)结合图象直接写出
时t的值.(保留一位小数,误差不超过0.2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66d0d708d016862a351e4206ee73865.png)
(2)在图2的平面直角坐标系中画出y的图象,并写出函数y的一条性质;
(3)结合图象直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8076b511e27939c629762296b8cfd08.png)
23-24九年级上·重庆开州·开学考试 查看更多[7]
重庆市开州区云枫教育集团2023-2024学年九年级上学期入学测试数学试题重庆市潼南区六校2023-2024学年九年级上学期第一次联考数学试题重庆市沙坪坝区第八中学校2023-2024学年九年级上学期第六次作业数学试题2023年重庆市第八中学校中考数学强化训练模拟预测题(四)重庆市部分学校2023-2024学年九年级下学期阶段测试数学试题2024学年重庆市巴蜀中学校九年级下学期数学模拟试题(已下线)中考重点05 动态几何+函数图像(6题型+满分技巧+限时检测)-2024年中考数学【热点·重点·难点】专练(重庆专用)
更新时间:2023-09-26 06:27:50
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解答题-问答题
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适中
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名校
【推荐1】如图①,在矩形 ABCD中,AB=30cm,BC=60cm.点P从点A出发,沿A→B→C→D路线向点D匀速运动,到达点D后停止;点Q从点D出发,沿 D→C→B→A路线向点A匀速运动,到达点A后停止.若点P、Q同时出发,在运动过程中,Q点停留了1s,图②是P、Q两点在折线AB-BC-CD上相距的路程S(cm)与时间t(s)之间的函数关系图象.
![](https://img.xkw.com/dksih/QBM/2016/7/11/1574217115344896/1574217121898496/STEM/c40f117358494f44bde950bff1e943b6.png?resizew=330)
(1)请解释图中点H的实际意义?
(2)求P、Q两点的运动速度;
(3)将图②补充完整;
(4)当时间t为何值时,△PCQ为等腰三角形?请直接写出t的值.
![](https://img.xkw.com/dksih/QBM/2016/7/11/1574217115344896/1574217121898496/STEM/c40f117358494f44bde950bff1e943b6.png?resizew=330)
(1)请解释图中点H的实际意义?
(2)求P、Q两点的运动速度;
(3)将图②补充完整;
(4)当时间t为何值时,△PCQ为等腰三角形?请直接写出t的值.
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解答题-计算题
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适中
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【推荐2】如图1,已知直线
,点
,
在直线
上,点
,
在直线
上,且AB//CD,若
保持不动,线段
先向右匀速平行移动,中间停止一段时间后再向左匀速平行移动.图2反映了
的长度
随时间
的变化而变化的情况,则
(1)在线段
开始平移之前,
_______
;
(2)线段
边向右平移了_______
,向右平移的速度是______
;
(3)图3反映了变化过程中
的面积
随时间
变化的情况.
①平行线
,
之间的距离为_______
;
②当
时,面积S的值为_____
;
③当
时,直接写出
关于
的函数关系式______(可以不化简).
![](https://img.xkw.com/dksih/QBM/2020/5/8/2458337032069120/2458448110690304/STEM/0ec6e991e6f04b2c82ca069491732274.png?resizew=206)
![](https://img.xkw.com/dksih/QBM/2020/5/8/2458337032069120/2458448110690304/STEM/f78bbed1af154d41926406614416a6b9.png?resizew=245)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80645381feb9746cc149da61d553974a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab39610f90249f6bbc5e41942786898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ca07a30fd25907fbb2f54e0d639b512.png)
(1)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca90e8a784f990c4097eec9219908d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97153bc3d02dfb38ee046487a8037a41.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dba1d72ab2c7823a90238b16e032a0.png)
(3)图3反映了变化过程中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81093ecb78b4ee7ed9dd140a25996d42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ca07a30fd25907fbb2f54e0d639b512.png)
①平行线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97153bc3d02dfb38ee046487a8037a41.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f10151385d21c8173c07e9d5cb23776d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67883bccfc7cc4a43cd9e64f88a1999f.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c81c2182ce28e5c62e63631466230fa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0cd93a45123a06e6c292efdcea1b6bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ca07a30fd25907fbb2f54e0d639b512.png)
![](https://img.xkw.com/dksih/QBM/2020/5/8/2458337032069120/2458448110690304/STEM/0ec6e991e6f04b2c82ca069491732274.png?resizew=206)
![](https://img.xkw.com/dksih/QBM/2020/5/8/2458337032069120/2458448110690304/STEM/f78bbed1af154d41926406614416a6b9.png?resizew=245)
![](https://img.xkw.com/dksih/QBM/2020/5/8/2458337032069120/2458448110690304/STEM/bea52a8b0d5a4eaea2bee0a8525ba310.png?resizew=306)
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解答题-证明题
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适中
(0.65)
【推荐1】如图,在等边
中,点D是
边上一点,连接
,将线段
绕点C按顺时针方向旋转
后得到
,连接
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/542b5bc10c7341c04c22244f3ec16e6a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/14/6050ad71-9800-47f8-8390-fce94ade29e7.png?resizew=120)
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解答题-证明题
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适中
(0.65)
【推荐2】如图,
是等边三角形,点
分别在边
上,且
,连接
交于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/d242aa72-542d-44d9-a895-02cda49aec91.png?resizew=373)
(1)如图1,求证:
;
(2)如图1,求
的度数;
(3)如图2,连接
,当
时,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a51949f48ee8cf746851ba779b078e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ed1fce01430ae31294c29d626626f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42218a68301d770accaaefb96b19f8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8fae5286f4db94b807b631ff00c45b3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/d242aa72-542d-44d9-a895-02cda49aec91.png?resizew=373)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab4c09b0afabd905848562b9f738bb7f.png)
(2)如图1,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024015816ece1fd176186ed0f04db8f9.png)
(3)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aac18b0388014ae20b2add2975ef56aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b490c01e3288ff5d22ff497d495fee0.png)
您最近一年使用:0次