1 . 在矩形
中,
(k为常数),点P是对角线
上一动点(不与B,D重合),,将射线
绕点P逆时针旋转90°与射线
交于点E,连接
.
时,将点P移动到对角线交点处,则
______,
______;当点P移动到其它位置时,
的大小______(填“改变”或“不变”);
(2)类比探究:如图2,若
时,当k的值确定时,请探究
的大小是否会随着点
的移动而发生变化,并说明理由;
(3)拓展应用:当
时,如图2,连接
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e49bc8e05c0a12b8b3365dab140e0aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e61620a272dada8d4b9a9fab6379dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971b23e3ee827018557d6c88edd5369a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96ebcc5d1c5c9ad3539232a419eb04cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e3eb6c275c686f000cf9bd4933415b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9b4a78c3b85dafdaec2e4e6dc87bd7.png)
(2)类比探究:如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c525393775354325cbf7839366ca50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9b4a78c3b85dafdaec2e4e6dc87bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)拓展应用:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c525393775354325cbf7839366ca50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e48c36e4c618227f649db122a5e52075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
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|
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2 . 如图,在正方形
中,
,对角线
上的有一动点P,以
为边作正方形
.下列结论:①在P点运动过程中,F点始终在射线
上;②在P点运动过程中,
可能为
;③若E是
的中点,连接
,则
的最小值为
;④
为等腰三角形时,
的值为
或
.其中结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/193e2724f0b4079d4ced73b918dbe55c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd601617f0ab200d5c80c37ab41d7323.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1cde7aace5b888a1a1c26fb911e2f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96645a3530e72d5d733d2c72147d340.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b61b7416bc7deb40caca231375213b08.png)
A.①②③ | B.①③④ | C.①③ | D.②④ |
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名校
3 . 定义:一组邻边相等且对角互补的四边形叫作“等补四边形”.如图1,四边形
中,
,
,则四边形
叫作“等补四边形”.
①在以下四种图形中,一定是“等补四边形”的是( )
A.平行四边形 B.菱形 C.矩形 D.正方形
②等补四边形
中,若
,则
;
③如图1,在四边形
中,
平分
,
,
.求证:四边形
是等补四边形.
(2)探究发现
如图2,在等补四边形
中,
,连接
,
是否平分
?请说明理由.
(3)拓展应用
如图3,在等补四边形
中,
,其外角
的平分线交
的延长线于点
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4e8f68457b449d2860ecd3361753b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
①在以下四种图形中,一定是“等补四边形”的是( )
A.平行四边形 B.菱形 C.矩形 D.正方形
②等补四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b5abfd7649b7acee7e1b33be0410e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2a8bf5e05a07c93a7104839fc21849.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c3c112368d374afe3c2f8a4a1ce29c.png)
③如图1,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/689196a03f24cc3cbe3a34bedbe38be0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)探究发现
如图2,在等补四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.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/727ad3e630a224303d6d3b8ad5c114ba.png)
(3)拓展应用
如图3,在等补四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e37b078d02601f76f0f8320b410809f.png)
![](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/640f058b479299659893cf524ddf6544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f21d8e7af78693e5da7957c8034e8bcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
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2024九年级下·浙江·专题练习
4 . 如图,正方形
的中心互相重合,边
分别与边
交于点I,J,K,L,连接
.若
,
,正方形
的面积比正方形
的面积大4,则四边形
的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/8/60102a6f-4c9a-4e3d-b252-2c3bf0eb8a09.png?resizew=164)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9e5b882e7bf48aaae26d21c235a8db9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/569e4971fea4e0b03da9c49ee5bdfa61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3d6ab773a57195060440278ce90128f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c2101b979a982181d0b4b531570972.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1a0abb703a4b3a249551180af66c532.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1542a2f556d7ec48ac6229e4eb82069.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64a8012195f63ecbb610ba810a806103.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/8/60102a6f-4c9a-4e3d-b252-2c3bf0eb8a09.png?resizew=164)
A.16 | B.18 | C.20 | D.24 |
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5 . 如图,在平而直角坐标系中,二次函数
的图象与
轴分别交于点
,顶点为
.连接
,将线段
绕点
按顺时针方向旋转
得到线段
,连接
.点
分别在线段
上,连接
与
交于点
.
,
的坐标;
(2)随着点
在线段
上运动.
①
的大小是否发生变化?请说明理由;
②线段
的长度是否存在最大值?若存在,求出最大值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab5058e158c93a35691db9b2c7ca0ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9cda46e575acf64941ea0964b89ee99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbb28ac2ec9b8d86d468e4f28377fdba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.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/b5191fd3625bf6bd3744807e3ccdb030.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a657ad89fde6f1175394697852e266e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4283ab02acdf80f9b425aa1df08ee6fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec9859da9c5171f917df44e444fd7b07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)随着点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1428d4a45e569bc6e39005ea3c9c8ec0.png)
②线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
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6 . 如图,正方形
和正方形
的顶点
,
,
,
,
在长方形
的边上.已知
,
,则长方形
的周长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/21be91d5-5762-4bbb-bc0a-ac60fb45d621.png?resizew=194)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec451d5570ebcaff780237106828c07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6245515a58230e71e99e12b39487c59.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/895dc3dc3a6606ff487a4c4863e18509.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0606f1ea19883bd14fd28d15116a0375.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d04b5e5bbf2bdaa364ee6fdcdc293a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/21be91d5-5762-4bbb-bc0a-ac60fb45d621.png?resizew=194)
A.52 | B.50 | C.48 | D.46 |
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7 . 如图,
,
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfaad5f25944b5422c6c7e12071d6417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbeac5d45de9548dd9d395d391c978e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11a92ac654ffe3eef11567ca7dd4e93b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/4c5ae8aa-89c0-4469-8b09-088ece0da67b.png?resizew=172)
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名校
8 . 如图,正方形
的边长为4,点E在
上且
,F为对角线
上一动点,则
周长的最小值为________
![](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/adc90c2d45477e166b02359525f40aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b80d32bd31d565cd7a5fa4b42dc2e040.png)
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|
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23卷引用:广东卷04—2021年《三步冲刺中考·数学》(广东专版)之第3步中考热身卷
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名校
9 . 如图,
和
是有公共顶点的两个等腰直角三角形,
,点P为射线
和射线
的交点,若
,将
绕点A旋转,求旋转过程中线段
的取值范围______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26813466e2ee49a493881a4384fc8748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abc28e69c1ba0aac981256887f7dfa94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
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10 . 在
中,
的平分线交直线
于点E、交
的延长线于点F,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/c0f5f558-4209-4584-b916-627d50632a5b.png?resizew=362)
(1)如图1,若
,G是
的中点,连接
、
.
①求证:
.
②请判断
的形状,并说明理由;
(2)如图2,若
,将线段
绕点F顺时针旋转
至
,连接
、
,那么
又是怎样的形状.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/c0f5f558-4209-4584-b916-627d50632a5b.png?resizew=362)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d96a5d40d0aea9f4398ca4d0fe9b0dd.png)
②请判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb1975abdfba3d89ee75a40e4239f6e7.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a58a622e2b1a239f2f96aa1501e9799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad1b0a76a887783392268ae203ad22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb1975abdfba3d89ee75a40e4239f6e7.png)
您最近一年使用:0次
2024-04-06更新
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