如图1,
,将线段
平移至线段
,点
(不与点
重合)在线段
上.
,求
的度数;
(2)求证:
;
(3)如图2,已知点
在
上,
分别交
的延长线于点
,垂足为点
.设
,且
满足
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f837ecfc80a3cfbfca0fec8aea0e736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2ee75a234ac05a3225e49ddd8c5065.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f2f350da33df321cfd90590faeaa034.png)
(3)如图2,已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b849f439abcb729ee6c42be9dffcc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1f420f45737b790d1bc562685edeb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8ba8c4cd0fee3d400ef3abd7a7a0acf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c128c0be6548dc167c610bd966044f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f704efe5af6ac0c9e4a72e89c70ecc1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8bbe96328ed5c1ee69cc17ccc6b06d6.png)
更新时间:2024-05-25 20:55:40
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图已知
,有一块三角板ABC,其中∠ACB=90°,∠BAC=30°,现将该三角板如图所示放置,使顶点B始终落在ON上,过点A作DA//ON交OM于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/8/467eb0aa-a627-4c6d-92f4-6bbc8f735be6.png?resizew=625)
(1)如图1,若BC//OM,∠CAD=40°,请求出
的大小;
(2)若∠BAE的平分线AP交ON于点P:
①如图2,当AP//OM,且
时,请说明:BC//OM;
②如图3,将三角板ABC沿直线 ON从左往右平移,且在平移的过程中,始终保持BC//OM不变,请探究∠OPA与
之间的数量关系,并直接写出你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c911916bd9ff50537b5e82683c3113.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/8/467eb0aa-a627-4c6d-92f4-6bbc8f735be6.png?resizew=625)
(1)如图1,若BC//OM,∠CAD=40°,请求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)若∠BAE的平分线AP交ON于点P:
①如图2,当AP//OM,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.png)
②如图3,将三角板ABC沿
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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解答题-问答题
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较难
(0.4)
【推荐2】已知:直线
,点A,B在直线a上,点C,D在直线b上,
,
,
平分
,
平分
,且
,
所在直线交于点
.
①如图1,若
,
,则
的度数为 ;
②如图2,设
,
,则
的度数为 (用含有α,β的式子表示).
(2)如图3,
平分
,
平分
,
,则
和
的数量关系是 .
(3)如图4,若
,
,且
平分
,
平分
,猜想
的结果并且证明你的结论;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a4352562ae8aa968014fd0d931b677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
①如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0612708c980c4e8927fe8b0c5b11ff26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3de20ba8bda63c650ef571be155702.png)
②如图2,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/597ce705d3a2fe04d29de9e81ec6250d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/102e0f5ca723747618a309c8b303fff4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3de20ba8bda63c650ef571be155702.png)
(2)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/435f30095577dc714634354f5ad27715.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c6c8c9bec9cb426ab66f5cdb0c6591d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec8012f09c7f5496c84f229ab769131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d034d287d9e7482e6521a50864f99643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502b2e185cf1eede6730577e6924e486.png)
(3)如图4,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42f2a9e333cc87e3538a9815cfa0d46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6047f65f51a97c94a852a111aca445d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b48771358b76e240743bb49c497ef7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebf7cc67acfa50ef6b21d9aa379e604a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee36da6258a903d7bf21f3861d952637.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 ,梯形ABCD中,
,点
在
上,连
与
的延长线交于点G.
(1)求证:
;
(2)当点F是BC的中点时,过F作
交
于点
,若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/592c3c10f3ba3cb1db5cfea06ec3c6af.png)
(2)当点F是BC的中点时,过F作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd8a97f37156cec6592795da3941f87.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/c493b8d19e7075fb41f356f6d52329bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2018/8/23/2016484225728512/2017228933529600/STEM/834a4f6baa1941a08850ca9964081374.png?resizew=124)
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名校
【推荐2】如图1,AB,BC被直线AC所截,点D是线段AC上的点,过点D作DE
AB,连接AE,∠B=∠E=75°.
BC的理由.
(2)将线段AE沿着直线AC平移得到线段PQ,连接DQ.
①如图2,当DE⊥DQ时,求∠Q的度数;
②在整个运动中,当∠Q=2∠EDQ时,求∠Q的度数.
③在整个运动中,求∠E、∠Q、∠EDQ之间的的等量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
(2)将线段AE沿着直线AC平移得到线段PQ,连接DQ.
①如图2,当DE⊥DQ时,求∠Q的度数;
②在整个运动中,当∠Q=2∠EDQ时,求∠Q的度数.
③在整个运动中,求∠E、∠Q、∠EDQ之间的的等量关系.
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解答题-证明题
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较难
(0.4)
【推荐1】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)
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![](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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解答题-证明题
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较难
(0.4)
【推荐2】如图1,在△ABC中,OB、OC是∠ABC、∠ACB的角平分线;
![](https://img.xkw.com/dksih/QBM/2017/3/21/1648655125856256/1658030066147328/STEM/96d6ededf0ce4fcb920b5e51b11d3da2.png?resizew=290)
(1)填写下面的表格.
(2)试猜想∠A与∠BOC之间存在一个怎样的数量关系,并证明你的猜想;
(3)如图2,△ABC的高BE、CD交于O点,试说明图中∠A与∠BOD的关系.
![](https://img.xkw.com/dksih/QBM/2017/3/21/1648655125856256/1658030066147328/STEM/96d6ededf0ce4fcb920b5e51b11d3da2.png?resizew=290)
(1)填写下面的表格.
∠A的度数 | 50° | 60° | 70° |
∠BOC的度数 |
(3)如图2,△ABC的高BE、CD交于O点,试说明图中∠A与∠BOD的关系.
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