如图,在
中,
,
分别垂直平分
,垂足分别为G,F,求
的度数.
![](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/b91282ceb67c94f7173cbab12ceccead.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e7106619c08f2bcc1d21f846e8a0de.png)
![](https://img.xkw.com/dksih/QBM/2023/1/5/3146159326560256/3146853049516032/STEM/fd977392d5e94cac93d570a4cb2deda9.png?resizew=236)
更新时间:2023-01-06 10:31:49
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相似题推荐
解答题-问答题
|
较易
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名校
【推荐1】如图,直线
,
的直角顶点
在直线
上,顶点
在直线
上,
交
于点
,
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eb21057985673147fc5afde46417e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de36aec23d150489da9166675afc849b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da9dcf6c319174c9ea2b1ceaed1649a.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/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289d7a880379d6060065c829b45b0ed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd6c90c2995d92cf25803555fdd95707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545c45fa4412d5bbf3cc5b338769efef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d21fa3492cd1ac2b3f9278d3fe4cd4fd.png)
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解答题-作图题
|
较易
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【推荐2】如图,在△ABC中,
(1)画出边
上的高
和中线
;
(2)若
,
,求
和
的度数.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/16/04b26aeb-9a15-48b3-b9b8-fd4590afb0cd.png?resizew=189)
(1)画出边
![](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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640e9e7c56e8eeda044fb55396088816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1be17e0a3e51cde1f50f384198e71e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5157b42da58d55daad27d98b2fec15ff.png)
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解答题-作图题
|
较易
(0.85)
【推荐1】如图,在
中,
为
边
上的中线,
.请用尺规作图法,在边
上求作一点E,使
.(保留作图痕迹,不写作法)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.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/8520a21b909d04f763d0f61dd74bc158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba11242dcc61d3c7c3555b598b5fdc89.png)
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解答题-证明题
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【推荐2】折纸是我国传统的民间艺术,精美的折纸背后离不开数学原理,这吸引了无数数学教育工作者以折痕为研究对象,关注折法和折叠过程中所得平面图形的性质.如图,矩形纸片
中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/1/b8ecffa0-6da7-414b-9187-1406252113cc.png?resizew=160)
(1)折叠矩形纸片
,使点C落在线段
上,折痕为
.直接写出
的度数;
(2)现要折出60°角,小明同学才用下面的方法.
步骤一:对折矩形纸片
,使
与
重合,得到折痕
,把纸片展平;
步骤二:再一次折叠纸片,____________________.
请在横线上将步骤二补充完整,并证明所折出的角为60°.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b9199a3de404cb13ae7710f73db5c8f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/1/b8ecffa0-6da7-414b-9187-1406252113cc.png?resizew=160)
(1)折叠矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28537fd3056afc85c8f671e0756666f0.png)
(2)现要折出60°角,小明同学才用下面的方法.
步骤一:对折矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
步骤二:再一次折叠纸片,____________________.
请在横线上将步骤二补充完整,并证明所折出的角为60°.
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解答题-作图题
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较易
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【推荐1】如图,在
中,
,点E在
的角平分线
上,且
.
(1)请利用尺规作图在图中按题意将图形作完整(保留作图痕迹,不写作法):
(2)求证:①
,②E是
的中点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8520a21b909d04f763d0f61dd74bc158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ac49caae8e3b8869d19beeff98966e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/10/72adbc51-52d4-43a2-b898-cc50e0cc85dc.png?resizew=182)
(1)请利用尺规作图在图中按题意将图形作完整(保留作图痕迹,不写作法):
(2)求证:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd6efd524e85bccb89fa4e859095df8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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解答题-作图题
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较易
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【推荐2】在
中,
,
为
边上一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/2b46ec7d-125d-4e40-a0a5-3ef6caa68748.png?resizew=186)
(1)用尺规完成作图:作线段
的垂直平分线交
于点
,交
于
,连接
,
;(注意:保留作图痕迹,不写作法,不下结论)
(2)若
,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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/2b46ec7d-125d-4e40-a0a5-3ef6caa68748.png?resizew=186)
(1)用尺规完成作图:作线段
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a438fe61c5d141d76d887b6fc2e8aaa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024dc2ccbbe321774df5d44e8785b203.png)
您最近一年使用:0次