1 . 已知直线
,
,
分别是直线
,
上的一点,
为平面上一点,
为
延长线上的一点,
交
于点F,
和
的角平分线
,
相交于点
.
(1)如图1,
①若
,
,求
的度数.
②试说明:
.
(2)如图2,当点N位于点F的左侧时,若
试求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eef1f7b9adab87736321e30949a4d668.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a8588dc60a543ad70d6bc0d263dbd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d76d1f1c2cccdc00e111e4f37b74459.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91d0d739401e5175ea64194632084088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/16/534543d8-22f9-43a9-a3a8-74a9f04c772b.png?resizew=334)
(1)如图1,
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6bd5f3e35355139cb7d55991face464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e92a477ee5c1988789c5a5263b7aa3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d9c1e0c3cab6b7bb3229221f4310ab0.png)
②试说明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d7d35dce9652d01cb9aaa3289496893.png)
(2)如图2,当点N位于点F的左侧时,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d53cd72000925484408ad25066dcd6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d9c1e0c3cab6b7bb3229221f4310ab0.png)
您最近一年使用:0次
2 . 如图1,
,
与直线
,
相交,点
为直线
、
之间的一点.
(1)若
,
,求
的度数;
(2)如图2,在(1)的条件下,
平分
交
于点
,
平分
交
于点
,猜想
的结果并证明你的结论;
(3)如图3,在(1)的条件下,点
是射线
上一动点,作射线
并在射线
上取一点
,使得
,再作
的平分线交直线
于点
,则当
点在射线
上移动时,
的大小是否变化?若不变,请求出
的大小;若变化,请求出其变化范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/22/d17eb756-a8f4-49e3-a9a6-84d511ed1728.png?resizew=531)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64093789e118804b716d199e78a85005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b7151e1818a644d1fdb792c8f0fafac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19768d8c55deb4973820aeab7a224e6a.png)
(2)如图2,在(1)的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d31cb19d4833eec524dc1d0bfdf97fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460aa3d83df61f6c411b34412135451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cf0f03734e0d7e4de1d02f2e99b5124.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71ecd1bc6374d41b53c29fd4ffe35f97.png)
(3)如图3,在(1)的条件下,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65bb1c5af4c7a9376882867e07690b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65bb1c5af4c7a9376882867e07690b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5631a5a858720b0797c0b9e60d5c37ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd00e6b7626ee3fe3d9e59faacb58849.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74299e0d10eb2e529628daf5e5b2cba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74299e0d10eb2e529628daf5e5b2cba2.png)
您最近一年使用:0次
3 . 在
中,
,
是直线
上一动点(不与点
,
重合).
(1)如图1,若
,点
在边
上,
交
于点
,
交
于点
.若
,求
的度数.
(2)如图2,若
,点
在边
上,
,交直线
于点
,交直线
于点
.
①线段
,
,
三者之间的数量关系是___________;
②若点
在
的延长线①中的结论是否成立?若成立,请给出推理过程;若不成立,请画出图形,并直接写出
,
,
三者之间的数量关系.
③若点
在边
上,且
,请判断
,
,
三者之间的数量关系,并说明理由.
![](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/8455657dde27aabe6adb7b188e031c11.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/4/4712f891-f755-4aef-858b-a5b44ced76eb.png?resizew=298)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ee7149bd58649b5c8b84439e118e53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.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/58cc90fee532e50d319081d571410421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e71378175f13d65c1f0558924d2a85f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3b0b11a80e8b107e55534d7fda9f2b.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b937442ad4cc480adc11bb143559454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
①线段
![](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/d40b319212a7e7528b053e1c7097e966.png)
②若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/d40b319212a7e7528b053e1c7097e966.png)
③若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b68e31c0164696680d71f98ad8834618.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
4 . 利用图形这一直观性语言,在一定程度上可以降低我们认识和理解抽象逻辑推理的难度;利用图形建构几何直观,可以轻松实现空间形式和数量关系的相互转化.让我们在如下的问题解决中体验一下吧!
如图1,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd05e8542a4afb53a104876b7a057cc5.png)
(2)【直观应用】
①应用上述结论,若图2中,
,则
、
、
、
、
、
的度数之和等于________.(直接给出结论,不必说明理由)
②应用上述结论,求图3所示的五角星中,
、
、
、
、
的度数之和是多少?并证明你的结论.
(3)【类比联系】
如图4,求
、
、
、
、
、
、
的度数之和是多少?并证明你的结论.
如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd05e8542a4afb53a104876b7a057cc5.png)
(2)【直观应用】
①应用上述结论,若图2中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f2244b4f11ee60e474c05882bf8f3fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b871a762469393cdd22f15aa49ebb8f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e8c257f5615d30660cef4157c6b273.png)
②应用上述结论,求图3所示的五角星中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b871a762469393cdd22f15aa49ebb8f9.png)
(3)【类比联系】
如图4,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b871a762469393cdd22f15aa49ebb8f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e8c257f5615d30660cef4157c6b273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e0a272aa29c4531aac22f28c64baf5.png)
您最近一年使用:0次
2023-07-24更新
|
262次组卷
|
5卷引用:四川省内江市2022-2023学年七年级下学期期末数学试题
四川省内江市2022-2023学年七年级下学期期末数学试题山东省青岛第六十五中学2022-2023学年八年级下学期开学考试数学试题(已下线)专题11.8 三角形章末拔尖卷-2023-2024学年八年级数学上册举一反三系列(人教版)(已下线)专题1.11 三角形的初步知识章末拔尖卷-2023-2024学年八年级数学上册举一反三系列(浙教版)安徽省六安市金安区六安皋城中学2023-2024学年八年级下学期期中数学试题
5 . 如图,在四边形
中,
,
,延长
到点
,
是
的平分线,
是
的平分线.
(1)如图1,当
时,求证:
;
(2)如图2,当
时,直线
交直线
于点
,问
与
,
之间有何数量关系?写出你的结论并证明;
(3)如果将(2)中的条件
改为
,那么
与
,
之间又有何数量关系?请直接写出结论,不用证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3202b1d9f838c32ab5765ce647d96b6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12ea718698b44ab67a5dac6206e54f0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d29e7c4d6216690152430b09f9cf0c2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/8/622d1391-a3b2-45a4-84a4-30bbce1cdafe.png?resizew=409)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbcc94966860872042dfaa25cd8ef7ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc18d7c5f9903ab90e40b0d9d62b105.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6db901868524464ef016565f59cbda2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f9c3b578fc0598d5ec6c79404c6cc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
(3)如果将(2)中的条件
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6db901868524464ef016565f59cbda2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7b76dbad5ee0d2732c5d4984e5a2caa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f9c3b578fc0598d5ec6c79404c6cc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
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2023-07-04更新
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317次组卷
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2卷引用:四川省成都市成华区2022-2023学年七年级下学期期末数学试题
名校
6 . 如图1,是一副直角三角板(
,
,
),让两块三角板的直角顶点及直角边分别重合放置,斜边AB,CD交于点M.
(1)求
的度数;
(2)若
位置保持不变,将
绕点O逆时针旋转
.
①当旋转至图2所示位置时,恰好
,求此时α的度数;
②在旋转过程中,是否存在CD与
的一边平行?若存在,请求出α的度数;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d3c378b1118d331d30b63fc587b270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b173ac8cc4ac4f1c9e1daaa605fbb27.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/6/bdf3cf23-597a-4c8a-903f-b2d20895c22e.png?resizew=295)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5071953255f6434eaefeab7176372564.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9a6eeeebf3cff569578d7366b755aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a300bf496955bf78c7f488e0f122dd1.png)
①当旋转至图2所示位置时,恰好
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cad39ccdd4fe036dbf08efa9b20a842.png)
②在旋转过程中,是否存在CD与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
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2023-07-02更新
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5卷引用:四川省成都市金堂县2022-2023学年七年级下学期期末数学试题
四川省成都市金堂县2022-2023学年七年级下学期期末数学试题四川省成都市邛崃、大邑、崇州、蒲江县2022-2023学年七年级下学期期末数学试题四川省成都市邛崃市2022-2023学年七年级下学期期末数学试题(已下线)专题7.35 平面图形的认识(二)的旋转问题(分层练习)(综合练)-2023-2024学年七年级数学下册基础知识专项突破讲与练(苏科版)江苏省 镇江市丹徒区高资中学2023-2024学年七年级下学期3月月考数学试题
7 . 如图,
中,
,
,
,将三角板
的直角顶点D放在
的斜边
的中点处,
交
于点M,
交
于点N.将三角板
绕点D旋转,当
时,
的长为______ .
![](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/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14af6bf74442941c372bb708bcdcb5e6.png)
![](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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14af6bf74442941c372bb708bcdcb5e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73cbd27d06065f2ddd5cf5ccbe5bef48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/5/77324740-0c02-4b06-8a2f-0a6d6bfad047.png?resizew=183)
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8 . 已知等腰
中,
,点D在射线
上,连接
,在
右侧作等腰
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/190cc5e255a9b1f18f5eb91e794e21dd.png)
(1)如图1,若
平分
,延长
、
交于点F,求证:
;
(2)如图2,点M为
的中点,求证:点M在线段
的垂直平分线上;
(3)如图3,射线
与射线
交于点G,若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.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/40e7ba6e267dde1a65a98f9f36b585ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/190cc5e255a9b1f18f5eb91e794e21dd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/8/c7523574-95fe-45ff-9307-be5c26768d6c.png?resizew=734)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe6d389a6c448d92b79d89bc9e8489f.png)
(2)如图2,点M为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(3)如图3,射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43181c7d36afac86d8ec182112254884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
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9 . 已知
,且B、C、D三点共线,
连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/9/6d71fefe-91ed-4434-8613-261ddfdf5944.png?resizew=153)
(1)一般说来,全等三角形可以通过轴对称、平移、旋转得到.请填空:
绕点B逆时针旋转 度,再向右平移 (填“
”、“
”或“
”)的距离,可得
.
(2)若
,
周长为24,求:
①线段
的长;
②
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a391c4d96cfb4e7c0f1df58a94be7218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/9/6d71fefe-91ed-4434-8613-261ddfdf5944.png?resizew=153)
(1)一般说来,全等三角形可以通过轴对称、平移、旋转得到.请填空:
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
①线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a2db6311e228ed33b6c71d0a5918cf.png)
您最近一年使用:0次
2023-07-02更新
|
161次组卷
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3卷引用:四川省眉山市仁寿县2022-2023学年七年级下学期期末数学试题
四川省眉山市仁寿县2022-2023学年七年级下学期期末数学试题(已下线)第02讲 中心对称-【帮课堂】2023-2024学年九年级数学上册同步学与练(人教版)河南省三门峡市陕州区2023-2024学年八年级上学期期末教情学情诊断数学试题
真题
名校
10 . 【问题呈现】
和
都是直角三角形,
,连接
,
,探究
,
的位置关系.
时,直接写出
,
的位置关系:____________;
(2)如图2,当
时,(1)中的结论是否成立?若成立,给出证明;若不成立,说明理由.
【拓展应用】
(3)当
时,将
绕点C旋转,使
三点恰好在同一直线上,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41663d9e5e18891475aeaa98794f33d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de5efe95decdbbc144754cda971f62f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060e7930731eddbcfac592b808e9b698.png)
【拓展应用】
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd82901e18614746fffc40f8de8e230e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb4817f6d025306bfcba653b4e8d4dc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次
2023-06-22更新
|
2112次组卷
|
28卷引用:2024年四川省乐山实验中学中考数学一调试题
2024年四川省乐山实验中学中考数学一调试题2023年湖北省黄冈市中考数学真题(已下线)专题31图形的旋转(优选真题60道)-学易金卷:三年(2021-2023)中考数学真题分项汇编【全国通用】辽宁省鞍山市千山区实验教育集团2023-2024学年九年级上学期10月月考数学试题(已下线)2023年湖北省黄冈市中考数学真题变式题21-24题山东省济南市平阴县教育教学研究中心2023-2024学年九年级上学期期中数学试题(已下线)专题4.46 相似三角形几何模型(旋转模型)(培优练)-2023-2024学年九年级数学上册基础知识专项突破讲与练(北师大版)河南省周口市淮阳区2023-2024学年九年级上学期12月月考数学试题江苏省泰州市海陵区民兴中英文学校2023-2024学年九年级上学期12月月考数学试题江苏省苏州市2023-2024学年九年级上学期期末数学试题山东省济南市平阴县2023-2024学年九年级上学期期中数学试题河南省漯河市临颍县2023-2024学年九年级上学期期末数学试题河南省新乡市辉县市2023-2024学年九年级上学期期末数学试题(已下线)专题2 迁移信息黑龙江省哈尔滨市香坊区第三十九中学2023-2024学年九年级下学期开学测数学(五四制)试题河南省鹤壁市浚县实验初级中学2023-2024学年九年级上学期11月月考数学试题山东省济南市商河县清华园学校2023-2024学年上学期九年级月考数学测试题浙江省金华市兰溪市第八中学2023-2024学年上学期学习能力调查(一)九年级数学试题湖北省十堰市郧西县2023-2024学年九年级下学期期中数学试题2024年河南省汝南县中考一模数学模拟试题江苏省南通市如皋市石庄镇初级中学2023-2024学年九年级下学期第一次阶段性数学试题2024年中考数学模拟预测题五2024年山东省威海市经济技术开发区皇冠中学中考一模数学模拟试题2024年湖北省丹江口市中考二模数学试题2024年湖北省十堰市竹山县中考模拟数学试题(已下线)专题10 三角形压轴题综合-2024年中考数学二轮热点题型归纳与变式演练(全国通用)湖北省黄石市阳新县陶港镇初级中学2023-2024学年九年级下学期期中数学试题2024年山东省济南市商河县中考二模数学试题