如图,点E在边AC上,已知
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/06d7f3af-9c87-4a6c-a971-f97280a6a994.png?resizew=181)
求证:
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb27272b4eb9ed057dd3b4d40697e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439fbb8974a5f907205d26b47b420bf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53df2a88f461611f7159d0f2f8ef60e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/06d7f3af-9c87-4a6c-a971-f97280a6a994.png?resizew=181)
求证:
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caed753f837c4fb30a93d0f029874a5f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f84e7f67eab034fa57f8a32666a86b7.png)
22-23八年级上·吉林长春·期中 查看更多[7]
吉林省长春市德惠市2022-2023学年八年级上学期期中数学试题(已下线)专题4.13 探索三角形全等的条件(ASA和AAS)(知识讲解)-2022-2023学年七年级数学下册基础知识专项讲练(北师大版)吉林省长春市榆树市2023-2024学年八年级上学期期中数学试题浙江省绍兴市柯桥区联盟2023-2024学年八年级上学期期中数学试题湖北省荆州市石首市2023-2024学年八年级上学期期中数学试题山东省济宁市微山县2022-2023学年八年级上学期期末数学试题吉林省长春市二道区第五十三中学2023-2024学年八年级上学期期中数学试题
更新时间:2023-01-11 22:15:53
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解答题-证明题
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【推荐1】小明和小亮准备用所学数学知识测一池塘的长度,经过实地测量,绘制如下图,点
在直线l上(点F、C之间的距离为池塘的长度),点A、D在直线l的异侧,且
,
,测得
.
;
(2)若
,
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的长度.
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1d90aa960e142d45451854042c78458.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4db70b069276e28682e4eb766b065aa.png)
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解答题-证明题
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(0.85)
【推荐2】如图,在
和
中,
,
,
和
相交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/2768d765-57a6-4893-9d05-913e79957782.png?resizew=128)
(1)求证:
;
(2)过点
作
于点
,若
,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b93f77fc658b1f307566bb05d6d629fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb27272b4eb9ed057dd3b4d40697e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/2768d765-57a6-4893-9d05-913e79957782.png?resizew=128)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c35c43d90814396ff06336fa45e9650.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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【推荐2】如图,
,
,
,
.
(1)求证:
;
(2)连接EC,AO,求证:AO垂直平分EC.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ae752bc1732e638f35cc08e347a5b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5adc18ca424552b35ab939e9d57943e.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2765917637583d22a579ff075f9baa3.png)
(2)连接EC,AO,求证:AO垂直平分EC.
![](https://img.xkw.com/dksih/QBM/2022/1/14/2894510941265920/2973431471063040/STEM/40054c08-4783-47c6-9d16-59244b222a87.png?resizew=199)
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