如图,等腰直角
中,
,
,请用直尺和圆规,作出符合下列条件的各点,不写作法,但保留必要的作图痕迹.
上一点
,
上一点
,使得
,且
最大;
(2)在第一问的条件下,作
上一点
,
上一点
,使得
,且
最小,并求出这个最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19bc7774144c164f7ebaeca54fa657e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/b5c91269f637e751e6659ac0bdb6290e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)在第一问的条件下,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f784b0f8dd9b0c4f46cea6e8af1c019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aaa13aec1fe37ed5c10c0fab3c231e9.png)
23-24八年级上·全国·期末 查看更多[3]
(已下线)人教版八年级数学期末押题卷01-2023-2024学年八年级数学上学期期末考点大串讲(人教版)(已下线)专题1.12 线段垂直平分线(题型分类拓展)-2023-2024学年八年级数学下册基础知识专项突破讲与练(北师大版)2024年江苏省无锡外国语学校中考数学二模试题
更新时间:2024-01-11 22:20:53
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相似题推荐
解答题-问答题
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【推荐1】在矩形AOBC中,OA=3cm,OB=4cm,分别以OB,OA所在直线为x轴和y轴,建立如图所示的平面直角坐标系.F是BC上的一个动点(不与B、C重合),过F点的反比例函数
(x>0)的图象与AC边交于点E,连接OE,OF,作直线EF.
![](https://img.xkw.com/dksih/QBM/2021/12/20/2876477586350080/2885594439843840/STEM/735606e3-f269-4ce1-8715-dec92f18b4d4.png?resizew=177)
(1)若BF=1cm,求反比例函数解新式;
(2)在(1)的条件下求出△EOF的面积;
(3)在点F的运动过程中,试说明
是定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://img.xkw.com/dksih/QBM/2021/12/20/2876477586350080/2885594439843840/STEM/735606e3-f269-4ce1-8715-dec92f18b4d4.png?resizew=177)
(1)若BF=1cm,求反比例函数解新式;
(2)在(1)的条件下求出△EOF的面积;
(3)在点F的运动过程中,试说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c00b40138159918d1720ca1276ed385d.png)
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解答题-计算题
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【推荐2】在平面直角坐标系中,我们定义,两个点之间的“直角距离”为这两个点的横坐标差的绝对值加上纵坐标差的绝对值.即在平面直角坐标系
中,任意两点
与
之间的“直角距离表示为
.对于平面内的一个动点P,若
则称动点P的轨迹为A、B两点的“等距线”.
例如:已知点
,点
,则
.
已知点
,点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b69b7f740a2845950d4d6e5606c32d.png)
(1)计算以下各点之间的直角距离:
_________,
_________,
________,
__________,
![](https://img.xkw.com/dksih/QBM/2022/5/13/2978501823758336/2987011608231936/STEM/9befd830-aeb2-4bb5-a348-099d3eaeec79.png?resizew=324)
(2)我们定义,到点A的直角距离为的点组成的图形为“
等距图形”.如上图中的正方形
为
等距图形.请在上图坐标系中画出
等距图形,
等距图形,
等距图形,
等距图形.(这样,我们发现点A和点B的等距线为图中的射线
、线段
及射线
组成的折线.)
(3)试着在下图坐标系中分别画出到
等距图形,
等距图形,
等距图形,
等距图形,并画出点A和点E的等距线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f021572c9349d56120b7094c34126623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/278c3598da951b73b53dc4a3929e65f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c45e54de62f5437e057d3cdb4c90eec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa551638dac79564f6dd0bfd546d7d3a.png)
例如:已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a865d0cdbd1f950ba14112528db7af2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75995c1f27ae9749cde107babeb37a69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2db28e59026171e270a6ec3677165d.png)
已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6ff81aedbefa935da289dc632e78eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b69b7f740a2845950d4d6e5606c32d.png)
(1)计算以下各点之间的直角距离:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b09bce4dcd26acaa4bc0a36cefa0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b358ab2eb4e6dcdc6ceb9603bc075ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59b75555c5fd661499872f5c2b21dc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28d199d38e7c63057b412557eab05746.png)
![](https://img.xkw.com/dksih/QBM/2022/5/13/2978501823758336/2987011608231936/STEM/9befd830-aeb2-4bb5-a348-099d3eaeec79.png?resizew=324)
(2)我们定义,到点A的直角距离为的点组成的图形为“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60771790ab67ef7230c86c2b2ca8a47a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0be2ee87b4e6f076047fe5416fddb7cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edec1be0ef7675ed1c841f27e7365a22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d1ac401fc0cdec904669aaa30cd80b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a593489d72cd4848b17c5256e6ff5c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f282d7d4b97eb78989b927324a782d64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0092174feded57357338a279d52b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(3)试着在下图坐标系中分别画出到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8abef25da95382c177104b9bcc02073b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e8d3665f8efe6c0ab12a21c4984b4ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faa9b289803050b1b43e7e0bec8d4da2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1f0a6bc6dc42b221cc64aa4c5b67215.png)
![](https://img.xkw.com/dksih/QBM/2022/5/13/2978501823758336/2987011608231936/STEM/1ff5f961-4078-43d3-9aec-5e91704ecc71.png?resizew=343)
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解答题-作图题
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【推荐1】如图,在
中,
,
.
![](https://img.xkw.com/dksih/QBM/2023/3/7/3189575151599616/3190335137234944/STEM/ec373bd166874855a9d6d5abcee4f286.png?resizew=182)
①分别以点A、B为圆心,以大于
的长度为半径作弧,分别交于两点,连接这两点的直线与
交于点D,与
交于点F,连接
;
②以点A为圆心,任意长为半径作弧,分别与
交于两点,再以这两点为圆心,以大于这两点间距离的一半的长度为半径作弧,两弧交于一点,连接点A与这一点交
于点E.
(1)通过以上作图,可以发现直线
是___________,射线
是___________;(在横线上填上合适的选项)
A.线段
的垂直平分线 B.
的角平分线
C.
的中线 D.
的角平分线
(2)在(1)所作的图中,若
,
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640e9e7c56e8eeda044fb55396088816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03c157441734cc2f1853bb3e15b631a2.png)
![](https://img.xkw.com/dksih/QBM/2023/3/7/3189575151599616/3190335137234944/STEM/ec373bd166874855a9d6d5abcee4f286.png?resizew=182)
①分别以点A、B为圆心,以大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d49404351575703cfe8325d1352ec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
②以点A为圆心,任意长为半径作弧,分别与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/737355fa2cd0dc9d6b91bf04ff851cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(1)通过以上作图,可以发现直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
A.线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868ff1350bd72625328c85c3097cd85e.png)
C.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721c75fcd58d3d54260aad0f82e09e37.png)
(2)在(1)所作的图中,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
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解答题-作图题
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【推荐2】如图,在△ABC中,AB>AC,按以下步骤作图:分别以点B和点C为圆心,大于
BC长为半径作圆弧,两弧相交于点M和点N,作直线MN交AB于点D;连接CD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/16/5b1a66a7-f52b-4285-982b-ab10d35f6319.png?resizew=173)
(1)则MN是BC的 线.
(2)若AB=8,AC=4,求△ACD的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/16/5b1a66a7-f52b-4285-982b-ab10d35f6319.png?resizew=173)
(1)则MN是BC的 线.
(2)若AB=8,AC=4,求△ACD的周长.
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解答题-应用题
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【推荐1】如图,在葫芦河的右岸边有一高楼
,左岸边有一坡度
的山坡
,点C与点B在同一水平面上,
与
在同一平面内.某数学兴趣小组为了测量楼
的高度,在坡底C处测得楼顶A的仰角为
,然后沿坡面
上行了
米到达点D处,此时在D处测得楼顶A的仰角为
.
的值.
(2)求楼
的高度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb929846943acd421c529d7868bb4969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b342d5cb6dd1c84a82f6aca68ed829c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1be5c7412a7d5e286508b8c8dac21a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c030b25575d683af91c06e6a3e4f463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
(2)求楼
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
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解答题-证明题
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【推荐2】如图,□ABCD中,BD是它的一条对角线,过A、C两点作AE⊥BD,CF⊥BD,垂足分别为E、F,延长AE、CF分别交CD、AB于M、N.
(2)已知DE=4,FN=3,求BN的长.
(2)已知DE=4,FN=3,求BN的长.
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解答题-作图题
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【推荐1】在正方形网格中,建立如图所示的平面直角坐标系,
的三个顶点都在格点上,
关于y轴对称图形为
(其中:
与
,
与
,
与
相对应).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/21/8fc0e8ee-6c25-487c-af04-7bbb8d4e9d2e.png?resizew=227)
(1)点
的坐标是________;
(2)在题图中画出
,并求
;
(3)点P是y轴上一动点,画出
最短时点P的位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/21/8fc0e8ee-6c25-487c-af04-7bbb8d4e9d2e.png?resizew=227)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
(2)在题图中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356df527566d5f008bf1ab64da996437.png)
(3)点P是y轴上一动点,画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51a8d10345f567e0f2daf18529d42f0.png)
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解答题-作图题
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【推荐2】如图,长方形
中,点
、
的坐标分别为
、
,点
为
中点;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/8e117658-8f2c-4497-919c-00f0261ac68c.png?resizew=206)
(1)尺规作图:请作出
的角平分线,交
于点
(不写作法,保留作图痕迹);
(2)求直线
的函数表达式;
(3)在线段
上是否存在一点P使
最小,若存在求出此时
的最小值;若不存在请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](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/1156a8b29780810bd472f6d9e11b0e39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a41261c5f84ff0863f4a1bc1a39f0cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/8e117658-8f2c-4497-919c-00f0261ac68c.png?resizew=206)
(1)尺规作图:请作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
(3)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4688c035ef5b8b5cec798a378b2c6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4688c035ef5b8b5cec798a378b2c6b.png)
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