下面是某数学兴趣小组对一个数学问题作的探究活动:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/27/c7c62b7d-484e-49a2-b977-eb78766278cb.png?resizew=265)
(1)如图1,小明同学得出
,他的判断理由是( )
A.
B.
C.
D.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2ba04decd9d9204ec64d567af55721.png)
(2)如图2,小颖同学作
于D,她认为
与
存在某种数量关系,那么
与
是否有数量关系?如果有数量关系,请你写出
与
的数量关系并说明理由;
(3)如图1,小华说,当
,当
是直角三角形时,可求出
的值,请你直接写出
的值.
问题: 如图1,已知, ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/27/c7c62b7d-484e-49a2-b977-eb78766278cb.png?resizew=265)
(1)如图1,小明同学得出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4231cbe93d49df13aaa36221da62594.png)
A.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cbfd199e0ba3e1ec7016a44454e7a3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec76570a0ddc83c103a4b77589d80701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9970629e91021aa64fb871c83746418c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2ba04decd9d9204ec64d567af55721.png)
(2)如图2,小颖同学作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb586785647b81ed737b09b40cabdf85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(3)如图1,小华说,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9774f83067ed956a551bc41adcce0469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b4dcc093218443f71a046b6df94bbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fe13fc149eeb17f119b12163ace88bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fe13fc149eeb17f119b12163ace88bd.png)
2022·河南濮阳·二模 查看更多[3]
2022年河南省濮阳市初中毕业年级第二次模拟考试数学试卷(已下线)黄金卷01-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(河南专用)山东省 济南市天桥区泺口实验学校2023-2024学年八年级上学期数学第三次月考试题
更新时间:2022-05-31 16:29:50
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解答题-问答题
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【推荐1】如图,已知点A的坐标是
,点B的坐标是
,以AB为直径做⊙
,交y轴的负半轴于点C,连接AC、BC,过A、B、C三点作抛物线.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/33df119b-9561-4de1-9920-716488ce7d7d.png?resizew=167)
(1)求此抛物线的解析式;
(2)点E是AC延长线上一点,
的平分线CD交⊙
于点D,连接BD,求点D的坐标;
(3)在(2)的条件下,抛物线上是否存在点P,使得
?如果存在,请求出点P的坐标;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97b3c94d505e7c5bcce94afec4af3d92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e86ccad8f44d7113ae84cecfb7563d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/33df119b-9561-4de1-9920-716488ce7d7d.png?resizew=167)
(1)求此抛物线的解析式;
(2)点E是AC延长线上一点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db866ecc0c098bfc32ec8a43b65bdd58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
(3)在(2)的条件下,抛物线上是否存在点P,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd40dcb11adbdffa4b0d14d02d0a93a8.png)
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【推荐2】如图,正方形ABCD的边长为1,点P在射线BC上(异于点B、C),直线AP与对角线BD及射线DC分别交于点F、Q.
(1)若BP=
,求∠BAP的度数;
(2)若点P在线段BC上,过点F作FG⊥CD,垂足为G,当△FGC≌△QCP时,求PC的长;
(3)以PQ为直径作⊙M.
①判断FC和⊙M的位置关系,并说明理由;
②当直线BD与⊙M相切时,直接写出PC的长.
(1)若BP=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
(2)若点P在线段BC上,过点F作FG⊥CD,垂足为G,当△FGC≌△QCP时,求PC的长;
(3)以PQ为直径作⊙M.
①判断FC和⊙M的位置关系,并说明理由;
②当直线BD与⊙M相切时,直接写出PC的长.
![](https://img.xkw.com/dksih/QBM/2016/10/13/1574247582072832/1574247588372480/STEM/b96da13ce0774ae4a29f9d37c6994b02.png)
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解答题-证明题
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【推荐1】如图,在
中,
,
为
边的中点,
为等边三角形.
![](https://img.xkw.com/dksih/QBM/2019/12/10/2352197650628608/2353090779553792/STEM/84d86939f6be4e6bbfbee283b7a8d9ac.png?resizew=125)
(1)求证:
;
(2)若
,在
边上找一点
,使得
最小,并求出这个最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab926d89b65f26c12e3da73ef1e5cf68.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/0222d3ec99bc21b586b083bd9d67b225.png)
![](https://img.xkw.com/dksih/QBM/2019/12/10/2352197650628608/2353090779553792/STEM/84d86939f6be4e6bbfbee283b7a8d9ac.png?resizew=125)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9299e3e10d37cfd8424a3bde0865d4b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fda933f83112bed6bb4571b668f70de1.png)
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解题方法
【推荐2】正方形ABCD和正方形AEFG的边长分别为6和2,将正方形AEFG绕点A逆时针旋转.
![](https://img.xkw.com/dksih/QBM/2022/3/3/2928278711910400/2932734160060416/STEM/22aae1d7-6037-4570-8b2d-cef59e7011cd.png?resizew=456)
(1)当旋转至图1位置时,连接BE,DG,线段BE和DG是否相等且垂直?请说明理由;
(2)在图1中,连接BD,BF,DF,请直接写出在旋转过程中
的面积最大值;
(3)在旋转过程中,当点G,E,D在同一直线上时,请求出线段BE的长.
![](https://img.xkw.com/dksih/QBM/2022/3/3/2928278711910400/2932734160060416/STEM/22aae1d7-6037-4570-8b2d-cef59e7011cd.png?resizew=456)
(1)当旋转至图1位置时,连接BE,DG,线段BE和DG是否相等且垂直?请说明理由;
(2)在图1中,连接BD,BF,DF,请直接写出在旋转过程中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7e64c953aaf341e772a5fe776fbc78a.png)
(3)在旋转过程中,当点G,E,D在同一直线上时,请求出线段BE的长.
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解答题-证明题
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【推荐1】如图1,在等腰中,
,点
是斜边
的中点,点
是
延长线上一点,连接
,过点
作
于点
,连接
.
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cc9c9a1c828f5b3c718e2a98a749192.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdafcb71f40077fd1df8edf870d221c9.png)
(3)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b21093eae7765f54a8de66750a63e1a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc1b68f13fed987f5209197de7bc8b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989bd133d61170743a988d35aba5f27a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926d2094777538ba6a70ea65d5061ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95ac0f36b4c32b923e77ea719fe065d1.png)
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【推荐2】某同学在一次课外活动中用硬纸片做了两个直角三角形,
中,
,
,
.
中,
,
,
.该同学将
的直角边
与
的斜边
重合在一起,并将
沿
方向移动,在移动过程中,D、E两点始终在
边上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/20/38877ef5-489b-4f41-a272-bf3ea5a01c1c.png?resizew=397)
(1)当
移动至什么位置,即
的长为多少时,F、C的连线与
平行?
(2)当
移动至什么位置,即
的长为多少时,以线段
、
、
的长为三边长的三角形是直角三角形?
(3)在
的移动过程中,是否存在某个位置,使得
?如果存在,求出
的长;如果不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c545764505bb00578a870c5e39493a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f73fbc2f33d3402cd96a776a376d9835.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6414089941feb5d8a4a6a49566b9ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c750cbbbe03c2d4fb2b4ea84f659631.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/20/38877ef5-489b-4f41-a272-bf3ea5a01c1c.png?resizew=397)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3739cc2bfdade48157210765e2758dea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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解答题-作图题
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【推荐1】如图,正方形
.过点B作射线
,交
的延长线于点P.点A关于直线
的对称点为E,连接
.其中
分别与射线
交于点G,H.
(2)设
,
______(用含
的式子表示),
______
;
(3)若
,用等式表示线段
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/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/819cd6f1ccc05d4a63223e8607fec0bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/824513ba3c12cec2601b75e831e8b4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8573bdd09f4da66c67306ae060801a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d63783f365e666ace307cadcaba60fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c44345de7d1f37b48def25db8c5e2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47c81b918e83cc3673cda4b89014120c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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【推荐2】如图,抛物线y=ax2+bx+c经过A(﹣1,0)、C(0,3)、B(2,3)
(1)求抛物线的解析式;
(2)线段AB上有一动点P,过点P作y轴的平行线,交抛物线于点Q,求线段PQ的最大值;
(3)抛物线的对称轴上是否存在点M,使△ABM为直角三角形?如果存在,求出点M的坐标;如果不存在,说明理由(4个坐标).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/19/e7e9202d-8169-492f-9e65-055af106604f.png?resizew=173)
(1)求抛物线的解析式;
(2)线段AB上有一动点P,过点P作y轴的平行线,交抛物线于点Q,求线段PQ的最大值;
(3)抛物线的对称轴上是否存在点M,使△ABM为直角三角形?如果存在,求出点M的坐标;如果不存在,说明理由(4个坐标).
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