![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2021/7/5/2757465993281536/2784782435647488/STEM/3f0606500e6740d782bdcc2d5ff4beab.png?resizew=173)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d03307f689eeb4ecb052c1f27bc9dc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c61c3619e09541cefc568b017d9ddbfb.png)
2021·湖北武汉·二模 查看更多[4]
2021年湖北省武汉市蔡甸区中考二模数学试卷(已下线)甘肃省武威市2021年中考数学真题变式汇编5(已下线)2022年湖北省黄冈市中考数学真题变式题21-24题2023年安徽省合肥市五十中学西校中考模拟数学试题
更新时间:2021-08-12 21:17:16
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相似题推荐
解答题-问答题
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名校
【推荐2】如图,在平行四边形
中,
平分
,已知
,
,
,
![](https://img.xkw.com/dksih/QBM/2021/9/12/2806367096864768/2810852880064512/STEM/cc66d8e1-6309-48f2-a44f-820a00797f21.png?resizew=285)
(1)求
的长.
(2)若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65ff13b4da65c7da3d898ba58e967b24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3032820a0d2d50d9143e7923f5936ddf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b1927db96d84f27197b5a654b622f6.png)
![](https://img.xkw.com/dksih/QBM/2021/9/12/2806367096864768/2810852880064512/STEM/cc66d8e1-6309-48f2-a44f-820a00797f21.png?resizew=285)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5fc481f25eed9546f11fde418be5b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
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解答题-证明题
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【推荐1】如图,
与
的
边相切于点
,与
边交于点
,
过
上一点
,且
,
是
的直径.
![](https://img.xkw.com/dksih/QBM/2021/1/25/2643599762366464/2652807384858624/STEM/f2aa2ba0-e92b-4774-81fc-b7d47e135836.png)
(1)求证:
是
的切线;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c852c73f3b7ac76cdc3d519e0a94b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/2021/1/25/2643599762366464/2652807384858624/STEM/f2aa2ba0-e92b-4774-81fc-b7d47e135836.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070bc896d35495237fd65576e9b6f88e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454328a8e75953fdb0835ce80d9566e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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解答题-作图题
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【推荐2】下面是小飞设计的“过圆外一点作圆的切线”的尺规作图过程
已知:
为
外一点.求作:经过点
的
的切线.作法:如图,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/fce16428-3f1f-4380-b36a-061929be9ce6.jpg?resizew=159)
①连接
,作线段
的垂直平分线交
于点
;
②以点
为圆心,
的长为半径作圆,交
于
、
两点;
③作直线
,
,
所以直线
,
就是所求作的切线.
根据小飞设计的尺规作图过程,
(1)使用直尺和圆规补全图形(保留作图痕迹);
(2)完成下面的证明(说明:括号里填写推理的依据).
证明:连接
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
∵
为
的直径,
∴
________(____________________)
∴
、
,
∴
、
为
切线(_________________________)
已知:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/fce16428-3f1f-4380-b36a-061929be9ce6.jpg?resizew=159)
①连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
②以点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.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/c5db41a1f31d6baee7c69990811edb9f.png)
③作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
所以直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
根据小飞设计的尺规作图过程,
(1)使用直尺和圆规补全图形(保留作图痕迹);
(2)完成下面的证明(说明:括号里填写推理的依据).
证明:连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68252db2e83c8b1be919346317a74e8f.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aac93c531ef3b5c2a7e29ffaa0ee9793.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e63c0f4ff5023e39700f46d33153e01.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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【推荐1】小军想出了一个测量建筑物高度的方法:在地面上点C处平放一面镜子,并在镜子上做一个标记,然后向后退去,直至站在点D处恰好看到建筑物AB的顶端A在镜子中的像与镜子上的标记重合(如图).设小军的眼睛距地面1.65m,BC、CD的长分别为60m、3m,求这座建筑物的高度.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/10980cc7-6d34-4114-913d-79a25fd23427.png?resizew=289)
您最近一年使用:0次
解答题-证明题
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【推荐2】已知:如图,在
中,
,点D、E是边
上的两个点,且
,过点C作
交
延长线于点F,连接
并延长与
交于点G.
(1)求证:
;
(2)连接
,如果
,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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2e629756a5766f170ecce81ab157b1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b00a5239269d72d6f9632e7d77347106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/6/ce0fa276-a7dd-41c6-a193-752b7b8ff6f7.png?resizew=129)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9463432e6cd69afa9ac0e9d264022ad5.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23731bf0282bc1b068141818dad39716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61515bb177e9f18c3c6b6946d8a4af84.png)
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解答题-证明题
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【推荐1】如图,根据图中数据完成填空或证明.
![](https://img.xkw.com/dksih/QBM/2021/10/12/2827802383630336/2828327272620032/STEM/3c03c8ed-2e8f-4314-a4a4-030c40608d48.png)
(1)在
中,
,请直接写出
与
的数量关系: ;
(2)将
放大
倍(或缩小)得到相似
,则
,猜想
,
,
(选填“
”“
”或“
”).选择其一证明.
![](https://img.xkw.com/dksih/QBM/2021/10/12/2827802383630336/2828327272620032/STEM/3c03c8ed-2e8f-4314-a4a4-030c40608d48.png)
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c884440d4cee3464288b3f5e9ce951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c181f86de3c96a7ef7a1a04c3a438f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e563e032dfdef69b0f357060c27bd4.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a377fef9eed44c063b257c6ee6b9fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c181f86de3c96a7ef7a1a04c3a438f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16c8e2461f3333cdd22531c49057e3b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32f2d4d1d2c16c54b2caef17840bfcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfd41361caac54a076624bc7813c3803.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aae1dc870a60a2070469d556deb472.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc1977a48dc007b1f7f525707a810d56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
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解答题-证明题
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【推荐2】如图,在菱形ABCD中,对角线AC与BD相交于点O,过点D作DE⊥BD交BC的延长线于点E.
![](https://img.xkw.com/dksih/QBM/2019/10/17/2313749769617408/2313876409974784/STEM/b1b68b7d2cc04718bbc397b3b901483e.png?resizew=185)
(1)求证:四边形ACED是平行四边形;
(2)若BD=4,AC=3,求cos∠CDE的值.
![](https://img.xkw.com/dksih/QBM/2019/10/17/2313749769617408/2313876409974784/STEM/b1b68b7d2cc04718bbc397b3b901483e.png?resizew=185)
(1)求证:四边形ACED是平行四边形;
(2)若BD=4,AC=3,求cos∠CDE的值.
您最近一年使用:0次