已知:直线AB、CR被直线UV所截,直线UV交直线AB于点B,交直线CR于点D,∠ABU+∠CDV=180°.
(1)如图1,求证:AB∥CD;
(2)如图2,BE∥DF,∠MEB=∠ABE+5°,∠FDR=35°,求∠MEB的度数;
(3)如图3,在(2)的条件下,点N在直线AB上,分别连接EN、ED,MG∥EN,连接ME,∠GME=∠GEM,∠EBD=2∠NEG,EB平分∠DEN,MH⊥UV于点H,若∠EDC=
∠CDB,求∠GMH的度数.
(1)如图1,求证:AB∥CD;
(2)如图2,BE∥DF,∠MEB=∠ABE+5°,∠FDR=35°,求∠MEB的度数;
(3)如图3,在(2)的条件下,点N在直线AB上,分别连接EN、ED,MG∥EN,连接ME,∠GME=∠GEM,∠EBD=2∠NEG,EB平分∠DEN,MH⊥UV于点H,若∠EDC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1985174e05ad371e13cf24d244423da4.png)
![](https://img.xkw.com/dksih/QBM/2022/1/11/2891930502520832/2892846456938496/STEM/71d0bfd7-7a7e-4042-902c-dbd350381d73.png?resizew=463)
21-22七年级上·黑龙江哈尔滨·期末 查看更多[3]
黑龙江省哈尔滨市香坊区2021-2022学年七年级上学期期末数学试题黑龙江省哈尔滨市群力经纬中学2022-2023学年七年级上学期十一月份数学学科阶段测试试卷(已下线)(培优特训)专项5.4 平行线模型(铅笔模型)-2022-2023学年七年级数学下册《同步考点解读·专题训练》(人教版)
更新时间:2022-01-12 13:34:05
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【推荐1】已知关于
的方程组
,其中
,
为整数.
(1)若方程组有无穷多组解,求实数
与
的值;
(2)当
时,方程组是否有整数解?如有,求出整数解;若没有,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(1)若方程组有无穷多组解,求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)当
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【推荐2】对于任意实数
,
,我们规定:
,
,例如:
,
.
(1)填空:
①
_________;
②若
,则
_________;
③若
,则
_________0.(填“
”,“
”或“=”)
(2)若
,且
,求
与
的值;
(3)若正整数
,
满足
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1a82adb186ce45193ab4bf0f4c146b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2f8daaf2c33371d4b0e204c396e331f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b1a1e0d8e5a6f0c09632cbe371efe08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d701813ca051128d0af34ef23745bd1.png)
(1)填空:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da060daefab2337b7870cb4f67b826ce.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4992ba071f6ac6a6af3e1a5eb9f97700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffa542c309be29ed638de2e4f988cd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200904bec6711851fd27431f7c533197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ffb2935c2519c1eeccfc4dbedc4dce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f29d5f376c75c41ae6af0c8a8565449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2822e6c0e7417d8325db43e032ec575b.png)
(3)若正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7e4f270b4105d2caa4399de16586381.png)
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【推荐1】如图所示,O是直线
上的一点,
是直角,
平分
.
![](https://img.xkw.com/dksih/QBM/2021/4/7/2694768127664128/2694807101538304/STEM/a0ac0aa0-a07e-4f48-ba8d-80be1c8fa4c6.png)
(1)如图①,若
,求
的度数;
(2)在图①,若
,直接写出
的度数_________(用含a的代数式表示);
(3)将图①中的
绕顶点O顺时针旋转至图②的位置.
①探究
和
的度数之间的关系,写出你的结论,并说明理由;
②在
的内部有一条射线
,满足
,试确定
与
的度数之间的关系,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://img.xkw.com/dksih/QBM/2021/4/7/2694768127664128/2694807101538304/STEM/a0ac0aa0-a07e-4f48-ba8d-80be1c8fa4c6.png)
(1)如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b5ca8919247ff7e80b00d686373757.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
(2)在图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f435c3556b48f0eccc958240fc6c7d6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
(3)将图①中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
①探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
②在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d78e44b2b912b9988d3064f3a38e5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778d3556c2454a733a15629af5c2444f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
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【推荐2】如图,∠AOB是直角,∠BOC=50°,OD平分∠AOC,若∠DOE=45°,那么OE平分∠BOC吗?请说明理由.
![](https://img.xkw.com/dksih/QBM/2017/10/25/1802761277284352/1803715872972801/STEM/18c45b55d8ca4cb9989b624d54b517b4.png?resizew=83)
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【推荐3】阅读理解:在钟面上,把一周分成12个大格,每个大格分成5个小格,所以每个大格对应的是
角,每个小格对应的是
角,时针每分钟转过的角度是0.5度,分针每分针转过的角度是6度.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/1e8169c6-4fe8-48ce-b1b0-ff175c3595d0.png?resizew=196)
(1)解决问题:当时钟的时刻是8:30时,求此时分针与时针所夹的锐角的度数.
(2)8:00开始几分钟后分针第一次追上时针.
(3)设在8:00时,分针的位置为
,时针的位置为
,运动后的分针为
,时针为
.问:在8:00~9:00之间,从8:00开始运动几分钟,
,
,
这三条射线,其中一条射线是另外两条射线所夹的角的平分线?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc63679c80e6bd24f3a27763d545dcdc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/1e8169c6-4fe8-48ce-b1b0-ff175c3595d0.png?resizew=196)
(1)解决问题:当时钟的时刻是8:30时,求此时分针与时针所夹的锐角的度数.
(2)8:00开始几分钟后分针第一次追上时针.
(3)设在8:00时,分针的位置为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
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【推荐1】已知:AB∥CD.
(1)探究∠B、∠BED、∠D之间的数量关系,并说明理由;
(2)利用上述中的结论,
①如图2,已知AB∥CD,试探究∠E、∠G、∠B、∠F、∠D之间的数量关系,并说明理由;
②如图3,已知AB∥CD,请直接写出∠B、∠D、∠E1、∠E2……∠En、∠F1、∠F2…∠Fn+1之间的数量关系.
(1)探究∠B、∠BED、∠D之间的数量关系,并说明理由;
(2)利用上述中的结论,
①如图2,已知AB∥CD,试探究∠E、∠G、∠B、∠F、∠D之间的数量关系,并说明理由;
②如图3,已知AB∥CD,请直接写出∠B、∠D、∠E1、∠E2……∠En、∠F1、∠F2…∠Fn+1之间的数量关系.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/281688be-18cc-4d04-9682-5bc9c8c21ac1.png?resizew=537)
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【推荐2】如图,四边形
为
的内接四边形,
,连接
,延长
至点E,连接
,使
.
;
(2)若
,求
的长度与
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b43be568ae5186900cfb39484a3c9301.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23693c34a7a70318d04a94a7a8a319a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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【推荐1】如图,
中,
,
、
为边
上的点,且满足
,
,连接
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/c2dba493-6a3f-449f-ad8e-dd234471318f.png?resizew=200)
(1)①若
,
,则
=______°;
②若
,则
=______;(用含
的式子表示)
(2)如图,
,
,连接
.求证:
平分
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a68d1411b29141ea7fc377b44ad92611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab0389bef7fea9fd2429966ef6bf2d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e03ca3e334c5290ab28b4b4a883c90c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/c2dba493-6a3f-449f-ad8e-dd234471318f.png?resizew=200)
(1)①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640e9e7c56e8eeda044fb55396088816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998329f9cdb86f5d60d7d5d70fc3781e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e37b078d02601f76f0f8320b410809f.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2cf0e95fdf1fd8a5b01d3dfd905e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e37b078d02601f76f0f8320b410809f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5bb04541e38bf8bef85d346f6b4ac43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe43e283881e3cfefc9cf60705530e83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
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【推荐2】如图1,在
中,
,
,D为AC的中点,E为边AB上一动点,连接DE,将
沿DE翻折,点A落在AC上方点F处,连接EF,CF.
![](https://img.xkw.com/dksih/QBM/2022/1/23/2900851698016256/2901564316393472/STEM/2272a4d0-252e-44dc-8a6f-51e62677e6ca.png?resizew=387)
(1)判断∠1与∠2是否相等并说明理由;
(2)若
与以点C,D,F为顶点的三角形全等,求出
的度数:
(3)翻折后,当
和
的重叠部分为等腰三角形时,直接写出
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c5840e0454fdec7d2158072c43b8db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://img.xkw.com/dksih/QBM/2022/1/23/2900851698016256/2901564316393472/STEM/2272a4d0-252e-44dc-8a6f-51e62677e6ca.png?resizew=387)
(1)判断∠1与∠2是否相等并说明理由;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
(3)翻折后,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
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【推荐3】在
中,
,直线l过点C.
时,如图1,分别过点A、B作
于点D,
于点E,
,
,求
的长;
(2)当
,
时,如图2,点B与点F关于直线
对称,连接
,
,动点M从点A出发,以每秒1个单位长度的速度沿
边向终点C运动,同时动点N从点F出发,以每秒3个单位的速度沿
向终点F运动,点M、N到达相应的终点时停止运动,过点M作
于点D,过点N作
于点E,设运动时间为
秒.
①
______;(用含t的代数式表示)
②当N在
路径上时,
______;(用含
的代数式表示)
③直接写出当
与
全等时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eddf629bfb2d7b9daea6f2c1553360af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13b505788d3d02bf232ac637fc3a8ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e72d26eae9a5470ac982541c609b109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/620fd368efb51a5ae90c0f3e276704d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61e11f30e2429935d5dd1ca03e385a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f41b099305c768388cfae01e18efcab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d46e6affe1a280804c7baa52eccad9d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd3b6b7e9aadb1189cb2a277a2f68f6.png)
②当N在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab547eebb789a2a51d4960c2fedd85e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42a1b84c7ee3e7036c6e49fe272aeb2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
③直接写出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4df3bfba489655847b24063d9bcd3773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5e705e9644995a842363e1ee3d76a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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