如图,在△ABC中,
,分别以A,B为圆心,大于
长为半径画弧,两弧交于M,N两点,直线
交
于点D,交
于点E,连接
,若
的周长为10,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d49404351575703cfe8325d1352ec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
A.2 | B.3 | C.4 | D.5 |
更新时间:2024-04-03 11:59:50
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【推荐1】下列说法中,错误的是( )
A.三角形的三条内角平分线必定交于一点,且这一点到三边的距离相等 | B.三角形三边的垂直平分线交于一点,且这一点到三个顶点的距离相等 |
C.有一个角为![]() | D.每一个命题一定有逆命题,每一个定理一定有逆定理 |
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【推荐2】如图,在
中,
,按以下步骤作图:①分别以点
为圆心,大于
的长为半径作弧,两弧交于点
;②作直线
交边
于点D,连接
,若
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/2020/6/22/2490291392929792/2494997207580673/STEM/cf2ec191145546a1965a80985cfc2d0d.png?resizew=175)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7257a804bbc55e5153307d07e7f00f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d49404351575703cfe8325d1352ec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e9b4d43dcc5238219029dd35d7e032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2020/6/22/2490291392929792/2494997207580673/STEM/cf2ec191145546a1965a80985cfc2d0d.png?resizew=175)
A.![]() | B.6 | C.4 | D.![]() |
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【推荐1】如图,在△ABC中,AB=AC,分别以点A,C为圆心,大于
AC的长为半径画弧,两弧相交于点E、F,直线EF交BC于点D.连接AD,已知AC=4,△ABD的周长是10,则BC的长是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/20/92c3286f-31f5-4d79-a40d-7e15eb6ace2a.png?resizew=182)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/20/92c3286f-31f5-4d79-a40d-7e15eb6ace2a.png?resizew=182)
A.5 | B.6 | C.7 | D.8 |
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【推荐2】如图,在
中,按以下步骤作图:
①分别以点A、C为圆心,以大于
的长为半径画弧,两弧交于P、Q两点;
②作直线
交
于点D,交
于点E;
③连接
.
若
,
,则
的周长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/23/60df3b2c-5928-4b50-a7a0-cfa864852d13.png?resizew=148)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
①分别以点A、C为圆心,以大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c93148adbc6e856da9a9d263f485d003.png)
②作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
③连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52d4bc1be051f904d4a6e06dc825395b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b79850d6b00a67110e77a33d1c46b5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/23/60df3b2c-5928-4b50-a7a0-cfa864852d13.png?resizew=148)
A.![]() | B.![]() | C.![]() | D.![]() |
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