如图,已知
中,
,以点B为圆心,
长为半径的弧分别交
于点D,E,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/b8d177b8-1229-4b03-b471-1d2fd6862775.png?resizew=106)
(1)写出图中所有的等腰三角形,并说明理由.
(2)若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b77c8ef75793d21d2d5d8bf470a61159.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e865141c0f519d944198bebb99d2dfff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65c296c372529e0a1e786c511a3c45a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/b8d177b8-1229-4b03-b471-1d2fd6862775.png?resizew=106)
(1)写出图中所有的等腰三角形,并说明理由.
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246a86f34603eaf2e6a948681b831b0d.png)
更新时间:2022-11-05 20:42:01
|
相似题推荐
解答题-证明题
|
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【推荐1】如图,在
中,
,延长
到点D,使
,延长
到点E,连接
,
,且
.
![](https://img.xkw.com/dksih/QBM/2024/2/20/3437251273367552/3437318178824192/STEM/e154ae19863444ff9a3dc9afc09436eb.png?resizew=170)
(1)求证:
;
(2)若
,
,求
的长.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78002bca853929365a3f58082f3e7637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77cdc615c6d573c6c697adf3f1915712.png)
![](https://img.xkw.com/dksih/QBM/2024/2/20/3437251273367552/3437318178824192/STEM/e154ae19863444ff9a3dc9afc09436eb.png?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b18f870939f4725ad8f7e42181a4a802.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0761165f1176f3a5fe4f7b052832316d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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【推荐2】如图,CE平分∠ACD,F为CA延长线上一点,FG∥CE交AB于点G,∠ACD=100°,∠AGF=20°,求∠B的度数.
![](https://img.xkw.com/dksih/QBM/2021/11/3/2843290158252032/2846178354946048/STEM/3ae1741a-db58-4045-8832-55c60317ee21.png)
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【推荐1】如图,已知
,
平分
.
![](https://img.xkw.com/dksih/QBM/2023/4/13/3215827290882048/3221580831178752/STEM/5e4d1e2ac0144dc6a6beaf0e19cf24a3.png?resizew=212)
(1)
与
相等吗?为什么?
(2)若
,
,判断
与
是否平行,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b3355e49927183f4b24df47725a0503.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d598f4a17ac14970ade9f381e9aee970.png)
![](https://img.xkw.com/dksih/QBM/2023/4/13/3215827290882048/3221580831178752/STEM/5e4d1e2ac0144dc6a6beaf0e19cf24a3.png?resizew=212)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a427709e6575431882877cda3b59ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc2ed067420a68283827093ac7281ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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【推荐2】如图,点B、E分别在AC、DF上,AF分别交BD、CE于点M、N.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/18/94cc6db0-afef-4f4e-8c7b-01d6a3dfcaef.png?resizew=154)
(1)若
,
,求
的度数;
(2)在①
;②
这两个条件中任选一个作为题目条件,补充在下面的横线上,并加以解答.若
,______,求证:
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/18/94cc6db0-afef-4f4e-8c7b-01d6a3dfcaef.png?resizew=154)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03c157441734cc2f1853bb3e15b631a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
(2)在①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b87b12dd59321d680719dca6ad095a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e6f5241f614c7d310cbf3e25a6d615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1beff025b32f688316009552d2fd8e1a.png)
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【推荐1】已知:在
中,
,点D在
的延长线上,
交
的延长线于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/402a9cd9-6e65-4007-bede-aed2deb7a3a9.png?resizew=388)
(1)如图1,若
,求证:
;
(2)如图2,作
的高
,连接
,若
平分
,求证:
;
(3)如图3,在(2)的条件下,过点B作
于点G,
交
于点H,连接
,若
,
,求三角形
的面积.
![](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/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105068b25f5a63af32f4082cfe08691e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/402a9cd9-6e65-4007-bede-aed2deb7a3a9.png?resizew=388)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc7897e3f49075943704f4dbef82e5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56ee81929c987732fcb379802eeef7a7.png)
(2)如图2,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe4bdc5d9e833b23a1b916c06fc1a35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3b0b11a80e8b107e55534d7fda9f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0488d2f939ae98e8d4a51e37b91cc062.png)
(3)如图3,在(2)的条件下,过点B作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d95b61ec1e624487162d4d739ceb48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d64e0206b1814c35cc96bd2b6b12239a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec67259153551e67bb3e035d11dc9334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33b0b0494b994fa27ec55342e840b785.png)
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【推荐2】如图,小正方形网格的边长是1个单位长度,
的顶点在格点上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/f02aa83e-4e0f-47df-b44b-b947df724282.png?resizew=271)
(1)画出
关于直线
对称的
;
(2)在直线l上找一点P,使
的长最短;(仅限用直尺作图)
(3)
的面积
______;
(4)画出
的角平分线
(仅限用直尺作图).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/f02aa83e-4e0f-47df-b44b-b947df724282.png?resizew=271)
(1)画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)在直线l上找一点P,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a13ec9a812274ad0839f20ba17348687.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
(4)画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
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解答题-问答题
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【推荐1】如图,
均是顶角为
的等腰三角形,
分别是底边,图中的哪两个三角形可以通过怎样的旋转而相互得到?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba609e8d47d6f4a51c454db50693192.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e47e80120afb8d7797daa39d54170dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3956369191d0383bdb8786134da7dd9f.png)
![](https://img.xkw.com/dksih/QBM/2021/10/20/2833510212263936/2841909843550208/STEM/bc02805182ff4b5890aa98025d80696d.png?resizew=136)
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【推荐2】如图,在△ABC中,CD平分∠ACB,DE∥BC,若
,且AC=14,求DE的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/debe56f220ffca9c830066acd935061b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/abbc0ed2-0f3f-4827-b889-cdc649c38272.png?resizew=137)
您最近一年使用:0次