如图:
的对角线
相交于点
,直线
过点
与
相交于点
,
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/0d498ffe-4fda-4f56-b7bc-4340c02cf2d4.png?resizew=341)
(1)
与
的数量关系是 ;
(2)若直线
与
的延长线相交于
,上述结论还成立吗?如成立,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d578394cd8e4d7a705599269c512960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba48366317ebea1c9dd5e4e67e03092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/0d498ffe-4fda-4f56-b7bc-4340c02cf2d4.png?resizew=341)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c078bb4ef1c431558da055bcecae036.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5842cd648ff2c62e66b2dd1c1ee3863.png)
23-24八年级下·江苏·周测 查看更多[2]
更新时间:2024-03-05 12:18:24
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】初步探究
(1)如图1,在四边形
中,
相交于点O,
,且
,则
与
的数量关系为 .
迁移探究
(2)如图2,在四边形
中,
相交于点O,
,(1)中
与
的数量关系还成立吗?如果成立,请说明理由.
拓展探究
(3)如图3,在四边形
中,
相交于点O,
,且
,求
的长.
(1)如图1,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ef285d0b087b41d8f744108b546d77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208f155347298c2ad3949346c85aa504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
迁移探究
(2)如图2,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ef285d0b087b41d8f744108b546d77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
拓展探究
(3)如图3,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/664f0d25799bef33c02205693f7be08c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cafc1c92f49c99862f4b1701f188562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,四边形
中,
,E是
的中点,且满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/9/79ed69e0-5941-4c0e-a8bf-a98dc2986c89.png?resizew=150)
(1)求证:
、
分别平分
:
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d5dd999aea55c7cab4641815fa53e0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/9/79ed69e0-5941-4c0e-a8bf-a98dc2986c89.png?resizew=150)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/315b8ca22ef1cf464994a4b4ec46ee0b.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a48e31deb78dadacc7e128ef3eb2a054.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,平行四边形ABCD中,过A作
于M,交BD于E,过C作
于N,交BD于F,连结AF、CE.
![](https://img.xkw.com/dksih/QBM/2022/4/22/2963741622116352/2966695506575360/STEM/8701fc9b-8b76-49e4-b109-ba2b28ffaeae.png?resizew=202)
(1)求证:
;
(2)求证:当
时,四边形AECF是菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed46a014ece6a0830c7c8b8deb2c56e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70eed72c64cc850a6d49e05580edad28.png)
![](https://img.xkw.com/dksih/QBM/2022/4/22/2963741622116352/2966695506575360/STEM/8701fc9b-8b76-49e4-b109-ba2b28ffaeae.png?resizew=202)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc408efaca1ecd3995db96b950ad4b75.png)
(2)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,已知在平行四边形
中,
,垂足为点E,
,点F为
的中点,点G是
上的一点,连接
.
,求
的长;
(2)若
,那么:①判断线段
和
的数量关系,并说明理由;②求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3f5dc11efe60b4fd9a13b1d6b83842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1d267eeb09c171c3e847f0597be31c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86a56dfb6ef3ec7925e2ee57f0274d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ade51fd154263bfa5f8f02bfe4ffbdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/789d64e81f869818c00f810001b5f5b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
您最近一年使用:0次