1 . 在
中,
,则
为_________ 三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d7e89caff03c4b978c41d9062f005a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2024-01-25更新
|
165次组卷
|
2卷引用:安徽省亳州市涡阳县2023-2024学年九年级上学期第一次联考数学试题
2 . 已知
、
、
是
的三边长,且满足
.试判断
的形状.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d85b8bdce73ae559763e23cd95921a67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
3 . 下列命题中假命题是( )
A.有一个内角等于![]() |
B.等腰三角形的两边长是4和8,则其周长为20 |
C.同一平面内,过直线外一点有且只有一条直线与这条直线平行 |
D.直角三角形的三条边长的比可能是![]() |
您最近一年使用:0次
4 . 如图,
,D是
的中点,
平分
.
(1)试说明:
;
(2)若
,试判断
的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab41054fa9ce51b68e78d9c0cf398d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77fb91bbadadc0dfd49182f7b836d129.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/22/5048d4aa-635c-4e0d-bdd6-b5a6ea10541a.png?resizew=175)
(1)试说明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75a91778530fee017af63165397d36b4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cccde778c619848076ea8c11b0b13a12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
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5 . 下列命题中,是假命题的是( )
A.有两个角相等的三角形是等边三角形 |
B.三个角都相等的三角形是等边三角形 |
C.三条边都相等的三角形是等边三角形 |
D.有一个角等于60° 的等腰三角形是等边三角形 |
您最近一年使用:0次
6 . 如图,菱形
中,对角线
、
相交于点
,
分别是边
、
的中点,连接
、
、
,则下列叙述不正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/4e1a3c1b-5526-4bad-a6a7-3a36a8da0de2.png?resizew=185)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/4e1a3c1b-5526-4bad-a6a7-3a36a8da0de2.png?resizew=185)
A.![]() | B.四边形![]() |
C.![]() | D.四边形![]() ![]() |
您最近一年使用:0次
7 . 已知a,b,c分别是
三边的长,且
,请判断
的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319b126647e1a0fd7baa6cb6c774e37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2024-01-14更新
|
67次组卷
|
2卷引用:甘肃省陇南市礼县第六中学2023-2024学年八年级上学期第二次月考数学试题
8 . 如图,点O是等边
内一点,
将
绕点C按顺时针方向旋转
得
,连接
,
是等边三角形.
(2)当
时,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b55774be674b2ad573ab7c5cbd53206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7ffcd1925a2b1259221c6a476152f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad1b0a76a887783392268ae203ad22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c042ff18466e8165fadf343d142a4b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c36a45a49e84fd0b9db01344592bc0df.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0c0fc3938f8fac7917ff996c7f725e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16c2342664c66dcf18f28a465e24e70c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
您最近一年使用:0次
2024-01-10更新
|
81次组卷
|
2卷引用:吉林省白城市大安市2023-2024学年九年级上学期期末数学试题
9 . 下列说法正确的是( )
A.等腰三角形的角平分线、中线、高线互相重合; |
B.三角形三边垂直平分线的交点到三边的距离相等; |
C.有一个角是![]() |
D.如果两个三角形全等,那么它们必是关于某条直线成轴对称的图形. |
您最近一年使用:0次
10 . 若一个三角形的三边长分别为a,b,c,且满足
.试判断该三角形的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67e93c7b73a241af038ff0319b1e89a0.png)
您最近一年使用:0次