如图,
是等边三角形,延长
至点D,将点D关于直线
对称得到点E,延长线段
至点F使得
,连接
,
,
,
,记线段
交直线
于点P,线段
交直线
于点Q,连接
.请你补全图形,判断
的形状,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aebb5baea4ac1668b674a8634e15bcbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87b2f781cafa7989d81f9bf8c42b150.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/12/8a9da500-29af-4962-b386-dc94d047a3ac.png?resizew=120)
更新时间:2023-09-10 15:00:23
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相似题推荐
解答题-证明题
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【推荐1】如图,△ABC中,∠BAC=90°,AB=AC,AD⊥BC,垂足是D,AE平分∠BAD,交BC于点E.在△ABC外取一点F,使FA⊥AE,FC⊥BC.
![](https://img.xkw.com/dksih/QBM/2016/3/8/1573981863952384/1573981869858816/STEM/a80d72b4-8c82-4986-9615-86892a777848.png?resizew=226)
(1)求证:BE=CF;
(2)在AB上取一点M,使BM=2DE,连接ME.试判断ME与BC是否垂直,并说明理由.
![](https://img.xkw.com/dksih/QBM/2016/3/8/1573981863952384/1573981869858816/STEM/a80d72b4-8c82-4986-9615-86892a777848.png?resizew=226)
(1)求证:BE=CF;
(2)在AB上取一点M,使BM=2DE,连接ME.试判断ME与BC是否垂直,并说明理由.
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【推荐2】如图,在直角坐标平面内,A、B、C三点坐标分别为(﹣2,0)、(2,0)、(0,2),已知点D(1,1)在线段BC上,连接DA交y轴于点G,过点C作CE⊥AD交AB于点F,垂足为点E.
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987882348642304/2988643764477952/STEM/0e2c074b7af0481cb45a77ca769a3503.png?resizew=222)
(1)求△DAB的面积;
(2)将图形补画完整,并说明OG=OF的理由.
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987882348642304/2988643764477952/STEM/0e2c074b7af0481cb45a77ca769a3503.png?resizew=222)
(1)求△DAB的面积;
(2)将图形补画完整,并说明OG=OF的理由.
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【推荐1】如图,在等边
中,
,点N为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/28/ffc9858f-eaa2-4ea4-9b7e-4dba3f1a0e1a.png?resizew=150)
(1)证明:
.
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf715662453fdde4020abbf1dc4904cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/28/ffc9858f-eaa2-4ea4-9b7e-4dba3f1a0e1a.png?resizew=150)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31307b00524e461b0ad8dfbcdf24bacf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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【推荐2】如图,在△MAB中,MA=MB,过M点作直线MN交AB于N点.P是直线MN上的一个动点,在点P移动的过程中,若NA=NB,则∠PAM与∠PBM是否相等?说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/2d31dd17-41fd-4149-a769-9c989ce1a378.png?resizew=160)
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【推荐1】如图,
中,
,以
为直径作
交
于点D,作
交
于点E,延长
交
的延长线于点F.
是
的切线;
(2)若
为等边三角形,
,求
半径的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.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/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86338536656046e93b53672ade9a78b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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【推荐2】如图,
是等边三角形,点
、
、
分别在
、
、
上;若
,
,求证:
![](https://img.xkw.com/dksih/QBM/2022/11/17/3111644669534208/3113773345742848/STEM/ddd08d9f19424deb8eb1a4f39426e79b.png?resizew=127)
(1)
;
(2)
是等边三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://img.xkw.com/dksih/QBM/2022/11/17/3111644669534208/3113773345742848/STEM/ddd08d9f19424deb8eb1a4f39426e79b.png?resizew=127)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18ad431480c898759d4d73e4f29c92e3.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
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