如图,
,
,
和
都是等边三角形,F为
中点,
交
于G点,下列结论中,正确的结论有( )个.
①
;
②四边形
是菱形;
③
;
④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab926d89b65f26c12e3da73ef1e5cf68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de4a54cc7818be87a239f6de5f5d05b.png)
②四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08c14e87a2bcf7090eab2fea73667d2.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b201ea04224e66276a0e67de4c510f1.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce21274f911d25437d83f0e6d4eadf1f.png)
A.1 | B.2 | C.3 | D.4 |
更新时间:2023-10-27 22:49:27
|
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【推荐1】如图,正六边形
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,
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,
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均是等边三角形,由这3个等边三角形组成一个新图形,现有下列结论:①
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是一个平角;③
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![](https://img.xkw.com/dksih/QBM/2020/3/22/2425040470638592/2425126911770625/STEM/4b38dc2f5d3c4df68d3df2e5004977a3.png?resizew=159)
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【推荐1】下列定理中逆定理正确的个数是( )
①对角线互相平分的四边形是平行四边形;
②在直角三角形中,斜边的平方等于两直角边的平方和;
③角平分线上的点到这个角两边的距离相等;
④矩形的对角线相等.
①对角线互相平分的四边形是平行四边形;
②在直角三角形中,斜边的平方等于两直角边的平方和;
③角平分线上的点到这个角两边的距离相等;
④矩形的对角线相等.
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】如图
,平行四边形
中,
,
为锐角,要在对角线
上找点
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为平行四边形,现有图
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
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真题
【推荐1】如图,在
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![](https://img.xkw.com/dksih/QBM/2017/8/1/1773761553645568/1773761553793024/STEM/958c5ff3a1854b93a2ed98826d9b5e6c.png)
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名校
【推荐2】如图,在菱形
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![](https://img.xkw.com/dksih/QBM/2022/6/24/3008303294898176/3016189567557632/STEM/f983197f4d0240fa9ce69952c3e78ede.png?resizew=121)
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【推荐1】如图,在矩形
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作
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作
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于点
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于点
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【推荐2】如图,在平行四边形
中,对角线
、
交于点O,并且
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交
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的变化是( )
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A.平行四边形→矩形→平行四边形→菱形→平行四边形 |
B.平行四边形→菱形→平行四边形→正方形→平行四边形 |
C.平行四边形→菱形→平行四边形→矩形→平行四边形 |
D.平行四边形→矩形→菱形→正方形→平行四边形 |
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