如图,点
、
在线段
上,且
是等边三角形.
(1)当
,
,
满足怎样的关系时,
;
(2)当
时,试求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/177678001b2ccde1db8f57fa5e017002.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/16/6375bfde-65a2-410f-b77c-365a0f732441.png?resizew=280)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7deeaa99836990f81ab8c1ce45594f2.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aaffbd3d24146368119bf559406673c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
更新时间:2024-03-01 17:23:00
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,点
、
、
分别在等边
的三边
、
、
上,且
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1ae5720b982b0dd7332c3b5024948e9.png)
;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f9e5ad901b5ac2d256c6f0a141a1554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1ae5720b982b0dd7332c3b5024948e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f7dcf7ee747f4bc92ee62275c00a396.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065f2c3527fcc9d84939c47ac8640643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,正三角形A,B,C的边长为8,点D,E,F分别为
的中点,以A,B,C三点为圆心,4为半径作圆,求图中阴影部分的面积,(结果保留π)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/746ee1515a178948b04f535705c6f738.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/20/e5d91886-eb94-431c-9121-4623394c0f25.jpg?resizew=126)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】下面是证明三角形中位线定理的两种添加辅助线的方法,选择其中一种,完成证明.
已知:如图,![]() ![]() ![]() ![]() ![]() 求证: ![]() ![]() | |
方法一 证明:如图,延长 ![]() ![]() ![]() ![]() | 方法二 证明:如图,过点 ![]() ![]() ![]() ![]() |
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,矩形
中,
,
,点
从点
出发,以每秒1个单位长度的速度在射线
上向右运动,运动时间为
秒,连接
交
于点
.
(1)求证:
;
(2)若
是以
为腰的等腰三角形,求运动时间
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8cc58ef27567f0ab06eb1012aec330.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/2/16653730-b6f3-4416-801d-8da2c699bcae.png?resizew=183)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e05c3548e92641ace7359e14baba05d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41984f53bb280ba8b5ac00a52ce2825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次