1 . 如图,
中,
的垂直平分线交
边于点E,
的垂直平分线交
边于点N; 若
, 则
的度数( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/f9693da3141d4af5e8deb0fd17dd5aeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cd151c4fccf42e84b0bfa07b12227b3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/fcf1a6b9-e9b1-45ed-b284-d11f6a4038ff.png?resizew=132)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 如图,在
中,
的垂直平分线交
于点D,交
于点E,
,若
,则
的长是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/6feabf68-f5a4-4fe8-8dfa-a3b9117d87f5.png?resizew=141)
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ee9bd02adf9c94a61f52e89d43c52b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/6feabf68-f5a4-4fe8-8dfa-a3b9117d87f5.png?resizew=141)
A.2 | B.3 | C.4 | D.不能确定 |
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3 . 如图,在
中,
是
的垂直平分线,
的周长为
,则
的周长是___
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d9b83904843f7e6b22b94429354a58a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff748d864eeeefef79124c297c0675c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/8771697a-deb3-44b1-8359-fb599a0800b2.png?resizew=144)
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4 . 如图,点
,B为x轴上一动点,线段AB的垂直平分线CD交y轴于点D,
轴交CD于C,记
.
(1)点C的轨迹是( )
①一条直线;②一条关于y轴对称的折线;③一条抛物线;
(2)求n与m的关系式;
(3)在B的运动过程中,是否存在
是等边三角形,如果不存在请说明理由,如果存在请求出此时C的坐标;
(4)当点O到直线CD距离等于2时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a23e87d16c32b5aa4357f481b5808a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b45db8dd8768994af51206565379fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5356182cc3bc478f7c2e3e6dee25e58d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/4/9ec3aa81-47b8-4f92-8919-bf24bf32d5fa.jpg?resizew=273)
(1)点C的轨迹是( )
①一条直线;②一条关于y轴对称的折线;③一条抛物线;
(2)求n与m的关系式;
(3)在B的运动过程中,是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(4)当点O到直线CD距离等于2时,直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8d7b4bb12628d5ed455d814b8aafa1f.png)
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5 . 如图,在等腰三角形
中,
,
为
的中点,
,垂足为
,过点
作
交
的延长线于点
,连接
、
.
(1)求证:
;
(2)连接
,试判断
的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe446a0456e9168028baee032d8d7d23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/be72b531-5154-4c7f-884e-42166641842b.png?resizew=146)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e521605c1066839c8cf71f0941b36d6d.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fb6e81fee5674c3e26a65e58cc506d.png)
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6 . 在
中,
,且
,
垂直平分
,交
于点F,交
于点E,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/1f3b5528-50d8-46be-a9bc-d7b6ce7a9004.png?resizew=167)
(1)若
,求
的度数;
(2)若
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e792b0ef3d542237ed0903194597651.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/1f3b5528-50d8-46be-a9bc-d7b6ce7a9004.png?resizew=167)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22d1cf32591961bc164d18ecd8eec2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adcae9d00980803e5955228d1e217abe.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c6bb8180b5ec79816ba3a85be3da5bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
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7 . 如图,在
中,边
的垂直平分线分别交
,
于点
,
,若
的周长为
,
,则
的周长为____
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/f52a58fbaf4fea03567e88a9f0f6e37e.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/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9822e15763be5cb6c49936df274a6748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f10d7b2b90d572faa0834128a3199d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/8f751cec-6ba3-45c2-93c2-d4dd17861006.png?resizew=142)
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8 . 如图,在
中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/18/0afaa2d5-d554-4a92-b27a-34afb7566926.png?resizew=222)
(1)尺规作图:作
的垂直平分线交
于点
,交
于点
,连接
.(保留作图痕迹,不写作法,不写出结论)
(2)在(1)的条件下,若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/18/0afaa2d5-d554-4a92-b27a-34afb7566926.png?resizew=222)
(1)尺规作图:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e19a24762d0c926dec6f464a31df6648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
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9 . 尺规作图题:(保留作图痕迹,不要求写作法)
如图所示,已知等腰三角形
中,若D为
边上的一定点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/22/28817e2b-0dbb-4c83-8795-29eef8c51494.png?resizew=114)
(1)作腰
的垂直平分线
交
于点E,交
于点F;
(2)在线段
上作一点M,使得
的周长最短.
如图所示,已知等腰三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/22/28817e2b-0dbb-4c83-8795-29eef8c51494.png?resizew=114)
(1)作腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e6f3b68e89128f89284df3132770a5a.png)
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10 . 如图,在四边形
中,
,
,
,
为
上一点,连接
,
交于点
,且
.
(1)连接
,求证:直线
是线段
的垂直平分线;
(2)求证:
是等边三角形;
(3)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a651eb577dbada1f29590e558d6f9fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aea70178f34595abab1a383326c74d3a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/23/0d4bb1ee-bd05-4666-ac7a-9ed3585cc4da.png?resizew=115)
(1)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc2357d8ac1404092b287e8e2b088b1.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bdf82f2b3ac77ee7b9b35aebe0dd83f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73538c09794f3223540bfe074edff82b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
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