如图,在
中,
,
是
边上的中线,
是
上一点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/d15312ed-f2d1-423e-bc23-d119db3fe805.png?resizew=190)
(1)求证:
;
(2)若
,求
的度数.
![](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/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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c056a26c993ab806c603f063f78da923.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/d15312ed-f2d1-423e-bc23-d119db3fe805.png?resizew=190)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105068b25f5a63af32f4082cfe08691e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6bb2556fbc0c5187e56c9f6384540.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
更新时间:2024-03-03 18:52:25
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】在
中,
边上的中线
,点E在
的延长线上,且
.
(1)求证:
;
(2)求
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d1fa345f0a79949e4207c673545134d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4abcd9292846e104dc2234b0aea41a81.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/31/7b54638b-2681-4859-99c1-a0975483a9d0.png?resizew=194)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83b5d737d39e5ea753c6c824dd964751.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5157b42da58d55daad27d98b2fec15ff.png)
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解答题-证明题
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适中
(0.65)
名校
【推荐2】如图,点
在一条直线上,
,连结
交
于
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/df2c01f1-3b55-4579-89a1-b570655a50c7.png?resizew=201)
(1)求证:
,
;
(2)求证:
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b0be603f88fcc28b78aae7394a71a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac61f3477e623aa4f924a82bd7a06ce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/df2c01f1-3b55-4579-89a1-b570655a50c7.png?resizew=201)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70e1ffbbd326b5b3569e8c42db75306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03733d1465d041a6d6da32bf91a7cff8.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/798d64de38e9d572ff83d68368ad0d9a.png)
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解答题-作图题
|
适中
(0.65)
【推荐1】如图,在
中,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/f0717669-011f-4195-a083-fa8f93065714.png?resizew=228)
(1)尺规作图:作
的角平分线
(不写作图过程,需保留作图痕迹);
(2)射线
交
于点
,若点
到
的距离为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a59b0ce65f9f26e0ddf8ac3db2dfb62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/f0717669-011f-4195-a083-fa8f93065714.png?resizew=228)
(1)尺规作图:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e37b122a7273e1251ea3860e74c896.png)
(2)射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e37b122a7273e1251ea3860e74c896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
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解答题-问答题
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适中
(0.65)
真题
【推荐2】已知:如图,M是
的中点,过点M的弦MN交AB于点C,设⊙O的半径为4cm,MN=4
cm.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/27/4b3e99e4-3298-4c71-b66c-4bf19f38986e.png?resizew=139)
(1)求圆心O到弦MN的距离;
(2)求∠ACM的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/27/4b3e99e4-3298-4c71-b66c-4bf19f38986e.png?resizew=139)
(1)求圆心O到弦MN的距离;
(2)求∠ACM的度数.
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解答题-问答题
|
适中
(0.65)
名校
【推荐1】如图,△ABC中,AC=BC,∠ACB=120°,点D在AB边上运动(D不与A、B重合),连结CD.作∠CDE=30°,DE交AC于点E.
![](https://img.xkw.com/dksih/QBM/2018/11/6/2069613196410880/null/STEM/50e34603bd444da99ce7ab62d6cfdca1.png?resizew=217)
(1)当DE∥BC时,△ACD的形状按角分类是 ;
(2)在点D的运动过程中,△ECD的形状可以是等腰三角形吗?若可以,请求出∠AED的度数;若不可以,请说明理由.
![](https://img.xkw.com/dksih/QBM/2018/11/6/2069613196410880/null/STEM/50e34603bd444da99ce7ab62d6cfdca1.png?resizew=217)
(1)当DE∥BC时,△ACD的形状按角分类是 ;
(2)在点D的运动过程中,△ECD的形状可以是等腰三角形吗?若可以,请求出∠AED的度数;若不可以,请说明理由.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】若一个三角形存在两边的平方和等于第三边的平方,则这个三角形为直角三角形.现在,我们新定义一种三角形:若一个三角形中存在两边的平方差等于第三边上高的平方,则称这个三角形为勾股高三角形,两边交点为勾股顶点.例如图1,在
中,
,则
为勾股高三角形,其中C为勾股顶点,
是
边上的高.
(1)等腰直角三角形______勾股高三角形(请填写“是”或者“不是” );
深入探究
(2)如图2,已知
为勾股高三角形,其中C为勾股顶点且
,CD是AB边上的高.试探究线段AD与CB的数量关系,并给予证明.
(3)如图3,等腰
为勾股高三角形,其中
,
是
边上的高,过点D作
交
于点E. 若
,试求线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e099c3476db7c3df359c6fb80599a25e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(1)等腰直角三角形______勾股高三角形(请填写“是”或者“不是” );
深入探究
(2)如图2,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/594c9a8c6d789ada157beb3e6aeba799.png)
(3)如图3,等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3582fb22962d70a3fa88e259e9736892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c0aa4c793921fdaa5d430cb90d78ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c6544495cdd913adfa727bda882a943.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】如图:
是等腰三角形,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://img.xkw.com/dksih/QBM/2021/11/10/2848329404645376/2852515190521856/STEM/fc1ba4e9-bba0-49b8-8ed2-2d2662c73dd8.jpg?resizew=138)
(1)若
,请你将三角形
分成两个等腰三角形,画一画,并标出各角的度数.
(2)若剪一刀,能将分割成两个等腰三角形,则
度数是多少?(直接写出答案)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://img.xkw.com/dksih/QBM/2021/11/10/2848329404645376/2852515190521856/STEM/fc1ba4e9-bba0-49b8-8ed2-2d2662c73dd8.jpg?resizew=138)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee54b9b398ce80cd054b56173fe810f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若剪一刀,能将分割成两个等腰三角形,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】已知
是⊙
的直径,弦
与
相交于点
,
.
(1)如图①,若
为
的中点,求
和
的大小;
(2)如图②,过点
作⊙
的切线,与
的延长线交于点
若
求
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d613b4c23659867485a8d8256655bfc5.png)
(1)如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246a86f34603eaf2e6a948681b831b0d.png)
(2)如图②,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/515cd8e17b4bd9545a4fdb82d0f154a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b5819f80ba4a0db18c19cac49f8023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19768d8c55deb4973820aeab7a224e6a.png)
![](https://img.xkw.com/dksih/QBM/2020/6/22/2490070379462656/2491525732179968/STEM/4972357adb3a4c95a275f6a2eab3cbec.png?resizew=427)
您最近一年使用:0次