如图2,点
在正方形
边
上,以
为对角线作正方形
,连接
,点
是线段
中点,连
,
,
.
(1)试判断线段
线
的数量关系和位置关系,并说明理由.
(2)将正方形
;绕点
顺时针转
度
,连接
,
,如图1.
①当
,
,
三点共线时,
,
,求
的长;
②求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9e953a4a5f98c96bbe67cbaadf76d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/24/0fafa60c-d11d-489b-8129-93cdc4d267fe.png?resizew=303)
(1)试判断线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c015d99f2677951bdcd0447240ef93.png)
(2)将正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/684ff5a8aa0547e87f948d216f2673d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
①当
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dd90bfa2987b84df430498021d5f648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6402c0f9eecfcdf73f9e87ca82a6f2c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/879f0479ae5ee30c6ecdfa3c2f535504.png)
更新时间:2023-08-20 16:03:04
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】如图,在
中,
,
是角平分线,点
、
分别在
、
上,且
,
、
分别是
、
的中点,
的延长线交边
于
,过
、
分别作
的垂线交边
与
、
,垂足分别为
、
.
(1)
;
(2)
;
(3)
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb980da8e86b4cfd322616dc84fc6e.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d567bdeba9b8e17d0911f594e141eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3998da44d274e5751d357beb1fa15a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db5956b3dda587b1acf7d486514ae1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9443ca8a2b929fd30f1fadd6db601f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7a19a9c04873699983623f68757eca8.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a918e38f652549b85b1cd9ca670bf75c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/902d5177feff43c797215fe7b79061c1.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3167478995b2defe5e71fccc8c3f8463.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】综合与实践:如图1,在
中,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/aeea0ff9-3e8c-4fc9-a4c3-8431e56268b4.png?resizew=551)
(1)
为射线
上一动点,连接
,以
为边且在
的左侧作正方形
;
①如图2,当点
在线段
上时(不与点
,
重合),线段
,
之间的位置关系为______ ,数量关系为______ ;
②如图3,当点
在线段
的延长线上时,①中的结论是否仍然成立?请说明理由;
(2)如图4,
是
外一点,连接
,
,
,
交
于点
,若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/aeea0ff9-3e8c-4fc9-a4c3-8431e56268b4.png?resizew=551)
(1)
![](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/03902478df1a55bc99703210bccab910.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/3ecc1cb55a57dde481f8dd07ab150676.png)
①如图2,当点
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
②如图3,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
(2)如图4,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/819da3836c66c6b2792f6bfe6fc1bc04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4fb90434b6da93bdc6590f769ef118b.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图1,在正方形
中,
为对角线
上一点(
),点
,
关于直线
对称,过点
作
的垂线,分别交
,
于点
,
.
(1)求证:
;
(2)若
,
,求
的长;
(3)如图2,连接
并延长与
的延长线交于点
,连接
.若已知
,设
,用含
的代数式表示
的面积,并求出
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68e5406f4916a15a54f9c5d148c96db8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/21/9b8d5258-cef8-45ef-bab3-8df08ae71517.png?resizew=437)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675c0d81b31d7b09a36d62d68d3e4e13.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6acf4bf8e5ad8f3e9e7a312f65c1b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d48852ad433b0da21abf5be0f79260d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58ef478c804c71ad3b374196a8ca9d74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6916f5928b337aa8c6bc8f5795487bff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e175c2e4410cde9d5693e67d3bdccaf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e175c2e4410cde9d5693e67d3bdccaf6.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图,
为
的直径,点A、E是
上两点,
,连接
、
、
、
,点B是
延长线上一点,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/7842ab56-5029-4bcb-a238-8a76da67dfd8.png?resizew=149)
(1)求证:
与
相切于点A;
(2)若
,求
.
(3)在(2)的条件下,若
半径为6,求弦
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7151f92b79054b5ec89628004ddba27c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14cccb1e06f334f55dae90ef813aae26.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/7842ab56-5029-4bcb-a238-8a76da67dfd8.png?resizew=149)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edf46f34a6deeca08b5c7405b7349904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb0b732912cec85d7818ba891cdf82ed.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐3】综合与实践
问题情境:数学活动课上,王老师出示了一个问题:如图1,在
中,D在
边上,E在
边上,
与
相交于点F,
.求证
.
(1)独立思考:请解答王老师提出的问题.
(2)实践探究:在原有问题条件不变的情况下,王老师增加下面的条件,并提出新问题,请你解答:“如图2,若
.猜想线段BE与线段CD的数量关系,并证明.”
(3)问题解决:数学活动小组同学对上述问题进行研究之后发现,当
时,若给出图2中任意两边长,则图2中所有已经用字母标记的线段长均可求.该小组提出下面的问题,请你解答:如图3,在(2)的条件下,若
,
,求
的长.
问题情境:数学活动课上,王老师出示了一个问题:如图1,在
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5778fcd07fcbcec6ebc1c8647a0b02c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb4f1e1d72d5c74eea8191852f33036.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/14/da200a67-57c2-457d-a945-8b9847817736.png?resizew=167)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/14/aaf12293-a3b8-4a54-a373-5fcbc1508889.png?resizew=154)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/14/6b7c1dae-bdea-47ec-8173-4bb6b72024d7.png?resizew=158)
(1)独立思考:请解答王老师提出的问题.
(2)实践探究:在原有问题条件不变的情况下,王老师增加下面的条件,并提出新问题,请你解答:“如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
(3)问题解决:数学活动小组同学对上述问题进行研究之后发现,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3767efa8adfb71001ad39df9560cbf6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c4599c8c996873814673237b8942df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38c5c9cc1ed4bce98b7fae77e70b227f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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解答题-证明题
|
较难
(0.4)
【推荐1】如图,
是等腰直角三角形,
,点D是三角形外一点.
(1)如图1,连接
,若
,
,
,求四边形
的面积;
(2)如图2,若
,求证:
;
(3)如图3,在(2)的条件下,过点C作
交DA延长线于点E,F、G分别为
的中点,连接
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/24/436f1293-c864-496e-8912-97703f965f12.png?resizew=358)
(1)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fb7c9b5376c6d491e743b710bc25701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ea38caeaba10066e0805f06cb9341d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454328a8e75953fdb0835ce80d9566e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae33911e41aa2f7004cc01e336f96bf0.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650c6c818df102a83ce5159e3208d01a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a21104b9de20902688dc92cfd4716835.png)
(3)如图3,在(2)的条件下,过点C作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef6d946ec5bc75341f7e5fe400054464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4af81b12fed3007d83005f31a5880fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50f06fd4af359c61ed1f8608bd722ea.png)
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解答题-作图题
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较难
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【推荐2】如图,在
中,
,点
为
中点,以
为直径作
交
于点
,线段
上有一点
.
(1)当点
在什么位置时,直线
与
有且只有一个公共点,请补全图形并说明理由.
(2)在(1)的条件下,当
,
时,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/14/e00fafaf-8b22-4abe-add1-5a21e1aac48b.png?resizew=138)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)在(1)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aed8b1342e67eae3aa59a104f3733a60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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解答题-问答题
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较难
(0.4)
【推荐3】(1)问题发现:如图1,在平面直角坐标系中,A点的坐标为(2
,0),点B的坐标为(0,2),连接AB,点C是AB的中点,点Q是线段AO上的动点,连接OC、CQ,以BQ为边构造等边△BPQ,连接OP、PQ.填空:
①OP与CQ的大小关系是 .
②OP的最小值为 .
(2)解决问题:在(1)的条件下,点Q运动的过程中当△ACQ为直角三角形时,求OP的长?
(3)拓展探究:如图2,当点B为直线x=﹣1上一动点,点A(2
,0),连接AB,以AB为一边向下作等边△ABP,连接OP,请直接写出OP的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
①OP与CQ的大小关系是 .
②OP的最小值为 .
(2)解决问题:在(1)的条件下,点Q运动的过程中当△ACQ为直角三角形时,求OP的长?
(3)拓展探究:如图2,当点B为直线x=﹣1上一动点,点A(2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2020/6/11/2482120727486464/2484573683777536/STEM/db3b00142a1d4927859e39433ae50540.png?resizew=366)
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解答题-问答题
|
较难
(0.4)
【推荐1】
探究不同裁剪方式的面积大小问题 | ||
素材1 | 图1是一张直角三角形纸板,两直角边分别为![]() ![]() |
|
素材2 | 小华同学按图2的方式裁剪出一个正方形;小明同学按图3的方式裁剪,且![]() |
|
素材3 | 小富同学对纸板的裁剪按如下步骤:如图4, 步骤1:在直角 ![]() ![]() ![]() 步骤2:取剩下的纸板 ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
|
问题解决 | ||
任务1 | 请比较小华、小明同学裁处的两种矩形的面积大小,通过计算说明. | |
任务2 | 请求出小富同学裁下的矩形![]() |
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解答题-问答题
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较难
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【推荐2】如图,直线y=4-x与两坐标轴分别相交于A、B点,点M是线段AB上任意一点(A、B两点除外),过M分别作MC⊥OA于点C,MD⊥OB于点D.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/ab28c06d-4d34-4494-a7a5-9a6f8ee095bd.png?resizew=486)
(1)当点M在AB上运动时,四边形OCMD的周长为 ;
(2)当四边形OCMD为正方形时,将正方形OCMD沿着x轴的正方向移动,设平移的距离为a (0<a≤4),在平移过程中:
①当平移距离a=1时, 正方形OCMD与△AOB重叠部分的面积为 ;
②当平移距离a是多少时,正方形OCMD的面积被直线AB分成l:3两个部分?
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/ab28c06d-4d34-4494-a7a5-9a6f8ee095bd.png?resizew=486)
(1)当点M在AB上运动时,四边形OCMD的周长为 ;
(2)当四边形OCMD为正方形时,将正方形OCMD沿着x轴的正方向移动,设平移的距离为a (0<a≤4),在平移过程中:
①当平移距离a=1时, 正方形OCMD与△AOB重叠部分的面积为 ;
②当平移距离a是多少时,正方形OCMD的面积被直线AB分成l:3两个部分?
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