题型:解答题-问答题
难度:0.4
引用次数:23
题号:22434296
问题提出
(1)如图1,
为⊙O的弦,
,点
是⊙O上的一个动点,且
,则
的最大值为 ;
(2)如图2,在矩形
中,
,
,以
为斜边在矩形外部作直角三角形
,
为
的中点,求
的最大值;
(3)如图3,老李家有一正方形花园
,他想对其进行设计改造,种植对称的植物,使得整个花园呈现出一种平衡和谐的感觉.在正方形
中,
米,
边上有两个点
、
,使得
,连接
、
.在
与
区域种植花卉,
是花园内一条小路,与
交汇于点
,在点
处设计一个凉亭.连接
,交
于点
,在
处设计一口水井.老李想在
与
之间铺设条笔直的水管,为了节约成本,要求
的长度尽可能的小,问
的长度是否存在最小值?若存在,求出
长度的最小值;若不存在,请说明理由.
(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392b9e1a179a6676362679354a9e7e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)如图2,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcf05aaa351239448a9ab0e048f76faf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a9b32570d553161be04d13954e92a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)如图3,老李家有一正方形花园
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbb91d806e628cf978557ffad6a7020.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff56ea00ca90825f3d95809de24f639.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/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df7626240940eb340420a605e95aeee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3064b70f24e9bbcab76e0dc61274b9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3064b70f24e9bbcab76e0dc61274b9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3064b70f24e9bbcab76e0dc61274b9b.png)
更新时间:2024-04-11 23:17:16
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图1,在平面直角坐标系中,点B为坐标原点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
,以
为边在第一象限作等边三角形
刚好落到x轴上,点P、Q分别是边
上的动点,点P从点A、点Q从点B分别沿
方向同时出发,且它们的速度都为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/b9311ded-1178-4cb3-afe5-1edfabcc8bfc.png?resizew=281)
(1)如图1,连接
交于点M,则在P、Q运动的过程中,
会变化吗?______(填“会”或“不会”);
(2)如图1,当
是直角三角形时,求点P的坐标;
(3)如图2,若点P、点Q分别运动到点B和点C后继续在射线
上运动,当
时,连接
,连接
并延长交
于点M,求
的度数和点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0225515b33e88e39a375cf689d8eea8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5631e6ec24d3d67bf4592313b6b3f4f8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/b9311ded-1178-4cb3-afe5-1edfabcc8bfc.png?resizew=281)
(1)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3bbe9c766451be9998ad730c3ea90c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be9baba5742fe32111ddd8a76fd5b265.png)
(2)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c495b8fd7f7bb21c177c9d50fbf6919.png)
(3)如图2,若点P、点Q分别运动到点B和点C后继续在射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9207c437e5e6ba5dee3927e4131d4e17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be9baba5742fe32111ddd8a76fd5b265.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐2】如图,在
中,
,以点A为圆心作
与
相切于D,交
于点F,在
上取点E,使
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/17/2c330cb7-feb0-4a76-b1d9-e32d07cd432c.png?resizew=145)
(1)求证:
是
的切线;
(2)若
,求点C到
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09de6bc03bcf984c84aebc72352da50d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65d87676f735510e07e8bdd0f246cb28.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/17/2c330cb7-feb0-4a76-b1d9-e32d07cd432c.png?resizew=145)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3503466cbee5cc7a9183f7a3777d5648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐3】【阅读材料】小高同学发现这样一个规律:两个顶角相等的等腰三角形,如果具有公共的顶点的顶点,并把它们的底角顶点连接起来则形成一组全等的三角形,小高把具有这个规律的图形称为“手拉手”图形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/0c4228fb-3419-4c8c-aeba-19e77c73beb6.png?resizew=576)
【材料理解】
(1)如图1,在“手拉手”图形中,小高发现若
,
,
,则
,请证明小高的发现.
【深入探究】
(2)如图2,
,
,
,试探索线段
,
,
之间满足的等量关系,并证明结论;
【延伸应用】
(3)①如图3,在四边形
中,
,
,
,
与
的数量关系为:________(直接写出答案,不需要说明理由);
②如图4,在四边形
中,
,若
,
,则
的长为________(直接写出答案,不需要说明理由).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/0c4228fb-3419-4c8c-aeba-19e77c73beb6.png?resizew=576)
【材料理解】
(1)如图1,在“手拉手”图形中,小高发现若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8abfdaab699cfe51bb9678110ad6aee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52273305805769a438772342b53c289e.png)
【深入探究】
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26813466e2ee49a493881a4384fc8748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
【延伸应用】
(3)①如图3,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532aece6cfd67e2a97977eed978dbf2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d2d3643a9579f2c693ef86909441e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2edd7dbb895fa95a022eb02bbe89d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3de20ba8bda63c650ef571be155702.png)
②如图4,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2894a6ff5b198184fffcaa1d03a33227.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f01c4faacedfe56f5127d6c0cc63cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】正方形
对角线
,
相交于点
,
为线段
上一点,连接
.
,
,求
的长度;
(2)如图2,
为
上一点,连接
,
为
上一点,连接
,
,若
,
,
,求证:
;
(3)如图3,若正方形
边长为
,延长
交
于
,在
上截取
,连接
交
于
,连接
交
于
,连接
,直接写出
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dae03ea239405994d1b6f20d15a36f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338c6c83ab4abc895ac36ab888a55be6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa138522a8436e5c120ef0856c2797c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6642cdb0bc02c08a6e46dda5fd5b4db5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/343f75b2c5479c279abca2faed278901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62cd09b8fe4b0543a4f8f0ea1e75a29.png)
(3)如图3,若正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/894e87e323066922a1e3222f8d40d870.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83ebffbdca89cc68c33706ab069fc6fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83ebffbdca89cc68c33706ab069fc6fb.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐2】如图1,一次函数
与x轴,y轴分别交于A,B两点,点C在y轴正半轴上且
,直线
过A,C两点.
的解析式;
(2)直线
上是否存在点M,使得
,若存在,求出点M的坐标,若不存在说明理由;
(3)如图2,点D是x轴正半轴上一点且
,点N是y轴上的一点,使得直线
与直线
所成的夹角等于
与
的和,直接写出所有符合条件的点N的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/088b56f67325cfecd738b1b81a1a2839.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc841f5f842ed4a9d155611cae1dc66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f03337caff2a53b97f30f9668d610ff0.png)
(3)如图2,点D是x轴正半轴上一点且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce45423dfd04d1eda929510c46979456.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
您最近一年使用:0次
解答题-作图题
|
较难
(0.4)
【推荐3】【背景】
数学课上老师给出一个问题背景让同学们探究结论:如图1,在
中,
,
,点
为
边中点,点
为射线
上一动点,连接
,将线段
绕点
顺时针旋转
得到线段
,连接
.
【探究】
(1)小明先画出当点E与点D重合时的图形(如图2),并探究出此时
与
之间的数量关系,下面是小明的部分分析过程,请将其补充完整.
(2)小明又画出点E在
上时的图形(图3)通过方法类比,请你探究此时线段
,
,
之间的数量关系,并说明理由:
【应用】
(3)在【背景】下,老师提出这样一个问题:若
,
,那么
的面积为多少?请直接写出该问题的答案.
数学课上老师给出一个问题背景让同学们探究结论:如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
【探究】
(1)小明先画出当点E与点D重合时的图形(如图2),并探究出此时
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
结论:![]() ![]() 方法分析:过点C作 ![]() ![]() 由条件:“线段 ![]() ![]() ![]() ![]() 可知 ![]() ![]() 又根据 ![]() ![]() 可得 ![]() 通过证明易得 ![]() ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
【应用】
(3)在【背景】下,老师提出这样一个问题:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4346641491fc90d125ebbd06343382a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f392cf697f88fc22678b5d02cbffb94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fb6e81fee5674c3e26a65e58cc506d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/31/66b41cec-4588-49bb-bc55-f055ea7548fb.png?resizew=553)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图,已知:在矩形ABCD中,AB=6cm,BC=8cm,点P从点B出发,沿BC方向匀速运动,速度为2cm/s;与点P同时,点Q从D点出发,沿DA方向匀速运动,速度为1cm/s;过点Q作QE//AC,交DC于点E. 设运动时间为t (s),(0<t<4),解答下列问题:
(1)在运动过程中,是否存在某一时刻t,使点P在AC的垂直平分线上?若存在,求出t的值;若不存在,请说明理由;
(2)设五边形APCEQ的面积为y,求y与t的函数关系式:
(3)当0<t<
时,是否存在某一时刻t,使△PQE是直角三角形?若存在,求出t的值;若不存在,请说明理由.
(1)在运动过程中,是否存在某一时刻t,使点P在AC的垂直平分线上?若存在,求出t的值;若不存在,请说明理由;
(2)设五边形APCEQ的面积为y,求y与t的函数关系式:
(3)当0<t<
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a391005600bdd69c96750589f9adb048.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/f1290fff-a082-4214-af14-30f21c128afd.png?resizew=414)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,
是矩形
的边
上一点,
,交
的延长线于点
交
于点
在矩形内部且为
的中点,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/a8ed96b6-3647-493a-b123-f197ee8ed467.png?resizew=227)
(1)求证:
;
(2)若
,求
的长;
(3)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc3a3137299ffaea0545cd45323f1af2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6077799f4c18937fd3bb7e14cf3d1e2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df4b833fb7dd03c34ac40c664cd8483d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7daeca1219535de017a3b4f518837419.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/a8ed96b6-3647-493a-b123-f197ee8ed467.png?resizew=227)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79fddcf3b1b6aec6d34bef7dd55c0a6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60a0ff152eceadaa19218ab1e66f01b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6f2e06041e2d4345d3b53688441df37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06b020e3977f31139a1153a1c1d23dc7.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐1】已知:AB为⊙O的直径,AB垂直弦CD于点E,F为⊙O上一点,AF=CD.
![](https://img.xkw.com/dksih/QBM/2022/3/1/2926641458085888/2931085121593344/STEM/e513bdad-9978-4d7b-9879-8a061b2e58e9.png?resizew=540)
(1)如图1,求证:∠COB+∠BAF=90°;
(2)如图2,延长AF、CD交于点P,求证:PD=PF;
(3)如图3,在(2)的条件下,连接AC、FE并延长交于点Q,若∠CAE+∠CEQ=45°,S△CQE=4,求AP的长.
![](https://img.xkw.com/dksih/QBM/2022/3/1/2926641458085888/2931085121593344/STEM/e513bdad-9978-4d7b-9879-8a061b2e58e9.png?resizew=540)
(1)如图1,求证:∠COB+∠BAF=90°;
(2)如图2,延长AF、CD交于点P,求证:PD=PF;
(3)如图3,在(2)的条件下,连接AC、FE并延长交于点Q,若∠CAE+∠CEQ=45°,S△CQE=4,求AP的长.
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】已知:在矩形
中,
,点
是
上一动点(不与端点
,
重合),连接
,
于点
,交
于点
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/269eff67-4a1a-483a-850f-adc544fbc26d.png?resizew=435)
(1)如图1,当点
运动到
的中点时.
①求证:
:
②若
,求
的值;
(2)如图2,当
时,点
在运动的过程中,是否存在点
和点
重合的情况?若存在,试确定此时
点的位置;若不存在,请说明理由.
(3)如图3,当
时,
的延长线交正方形外角
的平分线于点
,连接
交边
于点
,连接
,当
最小时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ae51f42830225591fa7b9f26052b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.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/80672dda9430cb42b3136bcb1b67bbad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/287eb7b9d7d5b93b81550f9c9d54a9ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/128147bd4834566a78b4e9d2a3b2139c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/269eff67-4a1a-483a-850f-adc544fbc26d.png?resizew=435)
(1)如图1,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/188861912de4183b6320568987202a20.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0cb4c3f194fadcfc831963e62ae0fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1c6e1e75491d56cfdb6a4cced7c8072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1548c88dd3ce530ed28c4d2bacf4a816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7ea03277f8408fabe5b327cc34838f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6283ef7114c395430583c6c9ff48a287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eab64bf465405cd87bb03f8cb61cb315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e53958c514f8863d1e45405b46d9637.png)
您最近一年使用:0次