在
中,
,
,将一块足够大的直角三角尺
(
、∠MPN=30°)按如图所示放置,顶点P在线段AB上滑动,三角尺的直角边PM始终经过点C,并且与CB的夹角
,斜边PN交AC于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/21/d5e8f131-c346-4574-a739-b25f85f19115.png?resizew=208)
(1)当
时,求
的度数:
(2)在点P的滑动过程中,
的形状可以是等腰三角形吗?若不可以,请说明理由;若可以,求出夹角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1be17e0a3e51cde1f50f384198e71e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ce50ba5e349425274f05d46d120a74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbbf59ea22f2df8655052fa83129a21a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/148e063b8ccc49f6745b32b418eb9659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/21/d5e8f131-c346-4574-a739-b25f85f19115.png?resizew=208)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/671fdac69c4951a72cc06f6d598044dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfc6f50c441d803f3b5ab60acc15a30d.png)
(2)在点P的滑动过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
更新时间:2022-06-18 14:14:43
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】已知:如图,在
中,
,
,点D在
上,且
,点E在
的延长线上,且
.
(1)求
的度数:
(2)①如果把题目中“
”的条件去掉,其他条件不变,那么
的度数会改变吗?请说明理由;
②若
,其他条件与①相同,则
的度数是多少?直接写出结果,结果用
表示.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b3ccbed8aa44da96fbf16bb9978b48.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/3ab0389bef7fea9fd2429966ef6bf2d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e03ca3e334c5290ab28b4b4a883c90c8.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e7106619c08f2bcc1d21f846e8a0de.png)
(2)①如果把题目中“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e7106619c08f2bcc1d21f846e8a0de.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2cf0e95fdf1fd8a5b01d3dfd905e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e7106619c08f2bcc1d21f846e8a0de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/2021/11/9/2847649291935744/2850359227449344/STEM/e981c191-c5c9-4bfc-b502-bd754ea630ba.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】如图所示,在△ABC中,已知AD⊥BC,∠B=64°,∠C=56°,
(1)求∠BAD和∠DAC的度数;
(2)若DE平分∠ADB,求∠AED的度数.
(1)求∠BAD和∠DAC的度数;
(2)若DE平分∠ADB,求∠AED的度数.
![](https://img.xkw.com/dksih/QBM/2018/8/17/2012473600819200/null/STEM/84efebefd5f54643a07f1c5c9926e133.png?resizew=159)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】已知在
中,
,
是
的中点,
是
上的一个动点(点
不与点
,
,
重合),分别过点
,
作射线
的垂线,垂足分别为
,
,连接
,
.
(1)如图①,当
时,
①求证:
;
②延长
,交
于点
,求证:
是
的中点;
(2)当
,
时.
①如图②,延长
,交
于点
,则
的度数为______;
②在点
运动的过程中,若
,
为等腰三角形,请直接写出
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.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/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/9/fac45fe5-8396-4c92-9ba3-44483bc459ee.png?resizew=486)
(1)如图①,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f8eebda19eded2b059774a8c2666c3.png)
②延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cf82e97595128f030504932bd738e6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41d54dbed71d22732877eb50af948a3f.png)
①如图②,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7f8bd15abf37c18dfaecf354b4103bf.png)
②在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf2e3236ea30ee2c37928b98041f13a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79c71c49dc9a9de1a0221769e4eb8616.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b3a0ba30edf07eb131a674d959317d5.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】如图,在
中,
,
,过点
作
,垂足为
,
恰好是
的平分线,求
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/9a5def4e504669ee62dafef0258aa84e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868ff1350bd72625328c85c3097cd85e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/0ba1e6cf-e1b1-456d-b37a-bed7e7a37151.png?resizew=179)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】已知:如图在
中,
,
,垂足为D,
是
的外角
的平分线,
于E,连接
交
于F.
的形状,并说明理由.
(2)求证:
,
;
(3)当
是什么三角形时,四边形
是一个正方形?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/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bab53e0cb6e6ec13764e326b98f26b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cab1578665918e9bc35fbefc92feb90c.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/8bc1cbcd6d00f0c36bad8254297d9f33.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/100b3e7dcd5f34c5234971cd75bff138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c9a3fbf5d6e3e9586dcb8c6c7e0c489.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc1cbcd6d00f0c36bad8254297d9f33.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在△ABD中,C是BD上的一点,且AC⊥BD,AC=BC=CD.
![](https://img.xkw.com/dksih/QBM/2016/1/29/1573965602889728/1573965608681472/STEM/0da5736ca1054ef6aeda0d6aa5dfd672.png?resizew=216)
(1)求证:△ABD是等腰三角形;
(2)求∠BAD的度数.
![](https://img.xkw.com/dksih/QBM/2016/1/29/1573965602889728/1573965608681472/STEM/0da5736ca1054ef6aeda0d6aa5dfd672.png?resizew=216)
(1)求证:△ABD是等腰三角形;
(2)求∠BAD的度数.
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解答题-作图题
|
适中
(0.65)
【推荐3】在一次数学兴趣小组活动中,小亮利用同弧所对的圆周角及圆心角的性质探索了一些问题,下面请你和小亮一起进入探索之旅.
【问题探索】
(1)如图1,点A、B、C、D在
上,点E在
外,且
.则
,
,
(填“>”、“<”或“=”)
操作实践】
(2)如图2,已知线段
和直线m,用直尺和圆规在直线m上作出所有点P,使
.(要求:用无刻度的直尺与圆规作出点P,保留作图痕迹,不写作法)
【迁移应用】
(3)请运用探索所得的学习经验,解决问题:如图3,已知
的半径为4,
,点A为优弧
上一动点,
交AC的延长线于点D.
①求
的度数;
②
面积的最大值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/14184ad5-0d53-4b56-9511-99a23095d2dc.png?resizew=413)
【问题探索】
(1)如图1,点A、B、C、D在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d35d8d8bb0dc17f2f86fe5b230a2b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b7960538cb70fcf641b94864a90190d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e515787ebe97ed2662237d9ca51ea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b871a762469393cdd22f15aa49ebb8f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://img.xkw.com/dksih/QBM/2023/11/3/3360176958341120/3362856709292032/STEM/4b10798acbb24737b955f5d1076aed4c.png?resizew=10)
(2)如图2,已知线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/072e3c5592c9bf835725dd3981fd275e.png)
【迁移应用】
(3)请运用探索所得的学习经验,解决问题:如图3,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d768ffd5bf75080e8ff5ce6b472c0cc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bb882b525043fb4602f598a9dfe5fbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8915e8e775538d41debf1933102c6b86.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
您最近一年使用:0次