若
是
的边,且
则
是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f5573b30734d65648f61c0a94c98de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e25ef833f5cabc79ec0a3d121e7df38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.锐角三角形 | B.直角三角形 | C.钝角三角形 | D.等边三角形 |
20-21八年级上·四川遂宁·阶段练习 查看更多[2]
四川省遂宁市船山区遂宁市第二中学校2020-2021学年八年级上学期第二阶段月考数学试题(已下线)专题1.13 《三角形的证明》专题练习(提升篇)-2020-2021学年八年级数学下册基础知识专项讲练(北师大版)
更新时间:2021-01-25 10:16:29
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】我们常用的十进制数,如
,我国古代《易经》一书记载,远古时期,人们通过在绳子上打结来记录数量,如图,一位母亲在从右到左依次排列的绳子上打结,并采用七进制(如
),用来记录孩子自出生后的天数,由图可知,孩子自出生后的天数是( )
![](https://img.xkw.com/dksih/QBM/2020/11/12/2591312046473216/2591587024134144/STEM/29eb71ee89ea458aab8da6fe101aa19a.png?resizew=88)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9857d4e0d8196d598f3857cc1de953c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a1036da4ea38437a013afe1b76a54d2.png)
![](https://img.xkw.com/dksih/QBM/2020/11/12/2591312046473216/2591587024134144/STEM/29eb71ee89ea458aab8da6fe101aa19a.png?resizew=88)
A.1326天 | B.510天 | C.336天 | D.84天 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】若x,y为实数,且
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab731404ffc3b25759d2dc934437c59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/308c40657853715b68325e83fc9f6909.png)
A.1 | B.2011 | C.-1 | D.-2011 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】如图,在
中
,
于点
,
于点
,
为
边的中点,连接
、
,则下列结论:①
;②
为等边三角形.下面判断正确的是( )
![](https://img.xkw.com/dksih/QBM/2018/1/5/1853737004384256/1855925708161024/STEM/d5cb60002ff7417a92669fc34ba0117f.png?resizew=155)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d3f843b83e62bab294988a7ea134a63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0ffdf36ba9697d1fe3376a854c26c01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4acd79bb9fb06f7c806eb6e17e4b613.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec1f8a14b2c1570aa076166017ccf33.png)
![](https://img.xkw.com/dksih/QBM/2018/1/5/1853737004384256/1855925708161024/STEM/d5cb60002ff7417a92669fc34ba0117f.png?resizew=155)
A.①正确 | B.②正确 |
C.①②都正确 | D.①②都不正确 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,在扇形AOB中,∠AOB=90°,OA=2 ,C是OA的中点,CE⊥OA交
于点E,以点O为圆心,以OC为半径作
交OB于点D,则图中阴影部分的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/d763a67e-de26-4f62-8ca0-191a40c7d6ed.png?resizew=175)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bb3820bab977db734f4335e4fde720.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/d763a67e-de26-4f62-8ca0-191a40c7d6ed.png?resizew=175)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次