已知:
内接于
,过点
作
,垂足为点
,
.
(1)如图1,求证:
;
(2)如图2,点
在
上,连接
,
为
中点,连接
,
.求证:
;
(3)如图3,在(2)的条件下,延长
、
分别交
于点
、
,
、
的延长线相交于点
,连接
,若
,
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70734a8e672376bb0bd1522e229f86a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fe957337517d6ef00c9e6fd59c49d0d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/ea91bf65-2b1f-410c-97f8-10d39af37800.png?resizew=591)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
(2)如图2,点
![](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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e009108343afaa2438dd9ebc1bf46547.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d59461614e585c966d847c512e5b92d.png)
(3)如图3,在(2)的条件下,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55be5081369077cc185b746fa783ee09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a94b1e3395ab1caba285ca0a587542be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c8034aef9ecb15c709331282b96eeb.png)
2021·黑龙江哈尔滨·一模 查看更多[3]
2021年黑龙江省哈尔滨市平房区中考调研测试(一)数学试题(已下线)数学-(四川成都卷)【试题猜想】2021年中考考前最后一卷(考试版+答题卡+全解全析+参考答案)(已下线)专题15 圆与相似综合-【微专题】2022-2023学年九年级数学下册常考点微专题提分精练(北师大版)
更新时间:2021-04-24 20:21:24
|
相似题推荐
解答题-证明题
|
困难
(0.15)
【推荐1】我们把两条中线互相垂直的三角形称为“中垂三角形”,例如图1,图2,图3中,
是
的中线,
,垂足为P.像
这样的三角形均为“中垂三角形”.设
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/c6e4d257-4cc1-46f0-92e5-46fef92dcd9c.png?resizew=133)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/ec91c45e-4a83-43f5-9e23-f2206a429733.png?resizew=211)
(1)[特例探索]
如图1,当
,
时,
______,
______;
如图2,当
,
时,
______,
______.
(2)[归纳证明]
请你观察(1)中的计算结果,猜想
,
,
三者之间的关系,用等式表示出来,并利用图3证明你发现的关系.
(3)[拓展应用]
利用(2)中的结论,解答下列问题:在边长为3的菱形
中,
为对角线
中点,
分别为线段
,
的中点,连接
并延长交于点
.
分别交
于点
,如图4所示,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/193a42f63312ac6a40d6e28ee93325aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187ed13a7bd532bd39af5e5ad7493a2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e781a2489271bfd1597cba1bb6f5887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df81cda12d7601d58b1d9c7c180c4d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c884a45b56bc34d79273b067c1520b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/3b182c5b-78e2-4836-822d-4d0e746eef62.png?resizew=118)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/f15a7f3d-58c3-491d-93c4-300f8b96b7e0.png?resizew=138)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/c6e4d257-4cc1-46f0-92e5-46fef92dcd9c.png?resizew=133)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/ec91c45e-4a83-43f5-9e23-f2206a429733.png?resizew=211)
(1)[特例探索]
如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eedf93beec809182ff56885c77cf18a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad09921d9904335a83078262ce62a473.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58d4184f5b731327886e0586442de69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b97bb18e5ca34d22b5e827316a122a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)[归纳证明]
请你观察(1)中的计算结果,猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8cc0b4997cae4d8aec791a1d3923314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a881309775c3b6a9f4ed408838666342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/566f7614d51f0348db982a9440de8844.png)
(3)[拓展应用]
利用(2)中的结论,解答下列问题:在边长为3的菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a373959bb9026f8a09845c0b828bf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec07ca71c03f8c1d6d3a1e2efcdff02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36537f5405f1c2c35f5a03eb198724e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0f3ed5ea1cf0fa8f7c6be46cd5fa057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d1e478ff979f8557e0f169eaf22f154.png)
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解答题-问答题
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解题方法
【推荐2】如图,在
ABC和
ADE中,∠BAC=∠DAE=90°,点P为射线BD,CE的交点.
(1)问题提出:如图1,若AD=AE,AB=AC.
①BD与CE的数量关系为 ;
②∠BPC的度数为 .
(2)猜想论证:如图2,若∠ADE=∠ABC=30°,则(1)中的结论是否成立?请说明理由.如果不正确请写出正确结论.
(3)拓展延伸:在(1)的条件中,若AB=3,AD=1,若把
ADE绕点A旋转,当∠EAC=90°时,直接写出PB的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(1)问题提出:如图1,若AD=AE,AB=AC.
①BD与CE的数量关系为 ;
②∠BPC的度数为 .
(2)猜想论证:如图2,若∠ADE=∠ABC=30°,则(1)中的结论是否成立?请说明理由.如果不正确请写出正确结论.
(3)拓展延伸:在(1)的条件中,若AB=3,AD=1,若把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/2020/10/8/2566643150790656/2567840769835008/STEM/f48db894341a469eadfc8b78560fe1ab.png?resizew=409)
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解答题-证明题
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困难
(0.15)
【推荐1】已知
为等边三角形,其边长为
.点
是
边上一动点,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/205b5fd7-2ee1-4eea-9398-ccad4be42405.png?resizew=401)
(1)如图
,点
在
边上且
,连接
交
于点
.
①求证:
;
②求
的度数;
(2)如图
,将线段
绕点
顺时针旋转
得线段
,连接
交
于点
.设
,
,求
与
的函数关系式;
(3)如图
,在(2)的条件下,延长
至点
,且
,连接
,
在点
运动过程中,当
的周长为
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/205b5fd7-2ee1-4eea-9398-ccad4be42405.png?resizew=401)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.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/7447ddd43b6d3b5bc91775f8782ed50d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1188e80ac6f99d7759e384656d9bf15f.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77282d5b97a60264cf15fb74b48e4b59.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a666403569e607f32af5f762c246dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b52933ebe6bd7b863f748c01a84cc85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.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/9b0266b81ad06d2a116f965179c5ae73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3d566704b44ea4ef1f99c37bd46902.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f32c425e7a8ed6d0d79c6e8e2df4302.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7086e8d3bd8849157f34777645bf32d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce448aff0208b52d0e8688ac590d221.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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解答题-问答题
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【推荐2】y=﹣2x+4直线交x轴于点A,交y轴于点B,抛物线y=﹣
(x﹣m)(x﹣6)(m>0)经过点A,交x轴于另一点C,如图所示.
(1)求抛物线的解析式.
(2)设抛物线的顶点为D,连接BD,AD,CD,动点P在BD上以每秒2个单位长度的速度由点B向点D运动,同时动点Q在线段CA上以每秒3个单位长度的速度由点C向点A运动,当其中一个点到达终点停止运动时,另一个点也随之停止运动,设运动时间为t秒.PQ交线段AD于点E.
①当∠DPE=∠CAD时,求t的值;
②过点E作EM⊥BD,垂足为点M,过点P作PN⊥BD交线段AB或AD于点N,当PN=EM时,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c46af2ff5b39b2e20c17f15cbdf5ffe.png)
(1)求抛物线的解析式.
(2)设抛物线的顶点为D,连接BD,AD,CD,动点P在BD上以每秒2个单位长度的速度由点B向点D运动,同时动点Q在线段CA上以每秒3个单位长度的速度由点C向点A运动,当其中一个点到达终点停止运动时,另一个点也随之停止运动,设运动时间为t秒.PQ交线段AD于点E.
①当∠DPE=∠CAD时,求t的值;
②过点E作EM⊥BD,垂足为点M,过点P作PN⊥BD交线段AB或AD于点N,当PN=EM时,求t的值.
![](https://img.xkw.com/dksih/QBM/2019/8/12/2267156486275072/2267219636756480/STEM/73687331c48649c6aafeb56ac1ce00ad.png?resizew=211)
您最近一年使用:0次
解答题-证明题
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解题方法
【推荐3】如图1,在直角坐标系中,O是坐标原点,抛物线
与x轴正半轴交于点A,与y轴交于点B,连接AB,点M,N分别是OA,AB的中点,
,且△CDE始终保持边ED经过点M,边CD经过点N,边DE与y轴交于点H,边CD与y轴交于点G.
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958625402535936/2966372183187456/STEM/d320eb4d-2322-4bee-97f1-3e6ec7c02793.png?resizew=766)
(1)填空:OA的长是_______,
的度数是______度;
(2)如图2,当
,连接HN.
①求证:四边形AMHN是平行四边形;
②判断点D是否在该抛物线的对称轴上,并说明理由;
(3)如图3,当边CD经过点O时,(此时点O与点G重合),过点D作
,交AB的延长线于点Q,延长ED到点K,使DK=DN,过点K作
,在KI上取一点P,使得
(点P,Q在直线ED的同侧),连接PQ,请直接写出PQ的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2b647e5dc263e037df7215f5f51fe2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cb10dad483e4d78ec0ca376fda89012.png)
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958625402535936/2966372183187456/STEM/d320eb4d-2322-4bee-97f1-3e6ec7c02793.png?resizew=766)
(1)填空:OA的长是_______,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2bc29145f6e7557711c34b443bd5e84.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe7eaf967808dad0a184eeedfa27721.png)
①求证:四边形AMHN是平行四边形;
②判断点D是否在该抛物线的对称轴上,并说明理由;
(3)如图3,当边CD经过点O时,(此时点O与点G重合),过点D作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3305bf4cac17b117665e04f78f7bc14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56f50d6b9e586659c3a654e6740a71a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50ad459361da93a2821dd73acdda292.png)
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解答题-证明题
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解题方法
【推荐1】已知:如图,AB为
的直径,弦
垂足为E,点H为弧AC上一点.连接DH交AB于点F,连接HA、BD,点G为DH上一点,连接AG,
.
(1)如图1,求证:
;
(2)如图2,连接HC,若
,求证:
;
(3)如图3,连接
交
于点K,若点F为DG的中点,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed35d1126c182c6ee7171193293319b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe49722ac9e0a3d9a957935c1e4294c.png)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/388beb971889bd122e476a945c2c27d4.png)
(2)如图2,连接HC,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3a75f169571f7c207c116c4cc33c618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b09bdb671a38067211136bcd292c6d8.png)
(3)如图3,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f32395bce0f32cf51671acddce256bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc1cb2f9d9b3a0f2bf046615450e396.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5918bfc84c8d0b52a41719abfc5124a1.png)
![](https://img.xkw.com/dksih/QBM/2020/5/7/2464160671948800/2465242076643328/STEM/84a28837d7c14cdfaff9ce6e6d7ae449.png?resizew=553)
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名校
【推荐2】在
中,弦
、
交于点
,连接
、
、
,
,
于点
.
;
(2)
为弦
中点,过点
作
,连接
,并延长
交
于
,
,求证:
;
(3)在(2)的条件下,若
,
,求
的直径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87ff51a767665863637f90fc36ce1f82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a7cf70f8772d8fea4599b18df2c88f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62523521909aa92aeb4357b910c1c424.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6360b68f150e85bf33a8f6ace090198b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b95463a97c60db3250cb641bf6523d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b95463a97c60db3250cb641bf6523d.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/f6744f9626a4e181c2cfd69b3ca39dee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2077c765d88a6ee7eedc734f21ca2245.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/489527b3e4e6a6499b5006eb6c1ff37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeedb5f361a1baff6338436fff6c471d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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解答题-问答题
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困难
(0.15)
解题方法
【推荐1】如图,平面上存在点P、点M与线段AB.若线段AB上存在一点Q,使得点M在以PQ为直径的圆上,则称点M为点P与线段AB的共圆点.
已知点P(0,1),点A(﹣2,﹣1),点B(2,﹣1).
(1)在点O(0,0),C(﹣2,1),D(3,0)中,可以成为点P与线段AB的共圆点的是 ;
(2)点K为x轴上一点,若点K为点P与线段AB的共圆点,请求出点K横坐标xK的取值范围;
(3)已知点M(m,﹣1),若直线y=
x+3上存在点P与线段AM的共圆点,请直接写出m的取值范围.
已知点P(0,1),点A(﹣2,﹣1),点B(2,﹣1).
(1)在点O(0,0),C(﹣2,1),D(3,0)中,可以成为点P与线段AB的共圆点的是 ;
(2)点K为x轴上一点,若点K为点P与线段AB的共圆点,请求出点K横坐标xK的取值范围;
(3)已知点M(m,﹣1),若直线y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/2020/5/31/2474349828726784/2475930178920448/STEM/a710d8fb0dbe4797a47380e0708174f5.png?resizew=222)
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困难
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解题方法
【推荐2】如图,已知在等腰
中,
,
,
,垂足为F,点D是边AB上一点(不与A,B重合)
![](https://img.xkw.com/dksih/QBM/2021/1/12/2634103549059072/2636061264068608/STEM/14626eb0-9416-4d04-b1f3-036b1ce62708.png?resizew=573)
(1)求边BC的长;
(2)如图2,延长DF交BC的延长线于点G,如果
,求线段AD的长;
(3)过点D作
,垂足为E,DE交BF于点Q,连接DF,如果
和
相似,求线段BD的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208a783d9f1e8fa691e9c72ab353cfac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d2f2e41907e30a4a14035f55e3c37c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f2a245381e615882ee5feb7793a1df6.png)
![](https://img.xkw.com/dksih/QBM/2021/1/12/2634103549059072/2636061264068608/STEM/14626eb0-9416-4d04-b1f3-036b1ce62708.png?resizew=573)
(1)求边BC的长;
(2)如图2,延长DF交BC的延长线于点G,如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c68309d3410c05f5675968900e91fbd0.png)
(3)过点D作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfbbef3d5bf07ba677841aa8c0bb392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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