如图,
沿直线MN折叠,使点
与AB边上的点
重合;若
,
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba22bf5f245b164054f1a7e3ced63e40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f149e83812e72efd7dd3dfc78d0134ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2224bb7e017b4d687e1d4f70ce3cd7.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-06-16 13:59:36
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【推荐1】如图,∠ABC=∠ACB,AD、BD、CD分别平分△ABC的外角∠EAC、内角∠ABC、外角∠ACF.以下结论:①
;②∠ACB=2∠ADB;③∠ADC=90°﹣∠ABD;④∠BDC=∠BAC.其中正确的结论有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】下列命题是真命题的是( )
A.三角形的三条角平分线交于一点 | B.三角形的外角等于两个内角的和 |
C.直角三角形只有一条高 | D.三角形的角平分线是一条射线 |
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【推荐1】如图,把
纸片的
沿
折叠,点A落在四边形
外,则
、
与
的关系是( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/28/3a961007-1f3c-41b8-a8a5-164f72fc3f84.png?resizew=135)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aebb01bc0fc49f2d3ff926f2eb1844f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/28/3a961007-1f3c-41b8-a8a5-164f72fc3f84.png?resizew=135)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】如图,将
纸片沿
折叠,使点
落在四边形
外点
的位置,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/2019/9/18/2293289082118144/2293418176258048/STEM/0256a9c7b860421597abe054439193e5.png?resizew=215)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d7ffb7889a31b267a85f1ea238138e.png)
![](https://img.xkw.com/dksih/QBM/2019/9/18/2293289082118144/2293418176258048/STEM/0256a9c7b860421597abe054439193e5.png?resizew=215)
A.![]() | B.![]() |
C.![]() | D.![]() |
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