如图,点C、D在
上,
,
,
,
、
相交于点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/445d1b52-818e-41b0-9534-d5f462398e94.png?resizew=172)
(1)求证:
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7de966c316db1013defc56372fcf814e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46d15148b8834e27cd599c99462f7aaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b4908b37cf23de34d38ae7a0bff278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/445d1b52-818e-41b0-9534-d5f462398e94.png?resizew=172)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a9f9a6cb86a409ecf19aa0f585f083e.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3379f93f65cfb92526ffc4a9859cbded.png)
更新时间:2024-01-17 20:25:48
|
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解答题-证明题
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【推荐1】如图,点D,E分别在AC,AB上,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/26/643b4460-8950-4e1f-af57-94d820a0ab3c.png?resizew=182)
(1)求证:
.
(2)若
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024dc2ccbbe321774df5d44e8785b203.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/26/643b4460-8950-4e1f-af57-94d820a0ab3c.png?resizew=182)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d6286a4689ba0c3b3bdd9358855266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68e744f480e11f588570c5d6738799f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
您最近一年使用:0次
解答题-问答题
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较易
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【推荐2】在物理课社团中,大家在测量一个小口圆柱形容器的壁厚时,大家大胆用到了数学知识发明了用“X型转动钳”.按如图方法进行测量,其中
,
,
,只需测得
,
,就可以知道圆柱形容器的壁厚了.
(1)请你利用所学习的数学知识说明
;
(2)求出圆柱形容器的壁厚.(用含有a,b的代数式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c35c43d90814396ff06336fa45e9650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c8dbc31b2e14067ef2f34b4e25f114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d2530e7023b2345c651e8f53629ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d42e97eee705d164e6ac6de9ecd6d1f.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/c350c156-9c75-43e8-9c76-1ab3a0c14ef4.png?resizew=139)
(1)请你利用所学习的数学知识说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
(2)求出圆柱形容器的壁厚.(用含有a,b的代数式表示)
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【推荐2】已知:如图,在△ABC中,∠ABC、∠ACB的平分线相交于点O,且MN∥BC,分别交AB、AC于点M、N.求证:MN=BM+CN.
您最近一年使用:0次