如图,在四边形
中,
,
.
是四边形
内一点,且
.求证:(1)
;(2)四边形
是菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178076b5090aa80570a760f3c2afa5cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65f8bc51340930e5b821dd1960462baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/043b405e3753e20c17f4bba122c80edc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab158dd9e96abcae0f115f54fa66c5b.png)
![](https://img.xkw.com/dksih/QBM/2018/6/18/1969784754429952/1970596504952832/STEM/e2c46603203a462a91d8b145bfdd021a.png?resizew=180)
2018·江苏南京·中考真题 查看更多[13]
江苏省南京市2018年中考数学试卷2018-2019学年度北师大版数学九年级上册 第1章《特殊的平行四边形》单元测试卷北师大版数学九年级上册同步练习: 1.1 菱形的性质与判定北师大版九年级上册 数学 第一章 特殊平行四边形 单元测试卷(已下线)2018年中考试题分项版解析汇编【第一期】专题4.3 四边形数学2019届北师大版九年级上册第1章特殊的平行四边形单元检测卷北师大版九年级上册 第2章 1.1 菱形的性质与判定第一课时菱形的判定2021年江苏省盐城市阜宁县中考数学一调试题2021年浙江省杭州市江干区九年级数学中考二模试题江苏省盐城市阜宁县2020-2021学年九年级下学期第一次学情调研数学试题2021年山东省日照市田家炳中学九年级下学期一模考试数学试题山东省日照市田家炳中学2020-2021学年九年级下学期一模考试数学试卷安徽省合肥市2020-2021学年八年级下学期期末数学试题
更新时间:2018-06-19 13:31:45
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相似题推荐
解答题-证明题
|
适中
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【推荐1】如图,∠A=∠B=40°,P为AB中点,点M为射线AC上(不与点A重合)的任意一点,连接MP,并使MP的延长线交射线BD于点N,设∠BPN=α.
![](https://img.xkw.com/dksih/QBM/2021/10/14/2829085895196672/2843406673543168/STEM/c46bb24b-662b-4f4f-8d52-d951eea78cec.png)
(1)求证:
APM![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4f0763c0973e539a73198990d4bfc4.png)
BPN;
(2)当α等于多少度时,以A、M、B、N为顶点的四边形是菱形?
![](https://img.xkw.com/dksih/QBM/2021/10/14/2829085895196672/2843406673543168/STEM/c46bb24b-662b-4f4f-8d52-d951eea78cec.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4f0763c0973e539a73198990d4bfc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(2)当α等于多少度时,以A、M、B、N为顶点的四边形是菱形?
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解答题-证明题
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【推荐2】如图,
中对角线
,
相交于点O,点E,F是对角线
的三等分点,连接
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/494a1c99-91bd-4b9e-bf84-66bae6c93ce7.png?resizew=198)
(1)求证:四边形
是平行四边形;
(2)①在
中添加一个条件______,使四边形
是矩形;
②在
中添加一个条件______,使四边形AECF是菱形,并选取其中一个小题说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.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/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/494a1c99-91bd-4b9e-bf84-66bae6c93ce7.png?resizew=198)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910936ec9fb419d51ce2f5ea817f8401.png)
(2)①在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910936ec9fb419d51ce2f5ea817f8401.png)
②在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
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解答题-作图题
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【推荐1】如图,
是
的内接三角形,
于点D.
![](https://img.xkw.com/dksih/QBM/2022/11/15/3110298004897792/3114958828052480/STEM/fd5eff0cab1c4f2098a238b43b6d9f7e.png?resizew=173)
下面是借助直尺,画出
中
的平分线的步骤:
①延长OD交
于点M;
②连接AM交BC于点N.
所以
.
即线段AN为所求
中
的平分线.
(1)依据题意,补全图形:
(2)请回答,得到
的两个主要依据是___________.(填写序号)
①垂直于弦的直径平分弦所对的劣弧; ②平分弦(不是直径)的直径垂直于弦;
③直径所对的圆周角是直角; ④等弧所对的圆周角相等.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7251d14111473460f02a65c7531c51f.png)
![](https://img.xkw.com/dksih/QBM/2022/11/15/3110298004897792/3114958828052480/STEM/fd5eff0cab1c4f2098a238b43b6d9f7e.png?resizew=173)
下面是借助直尺,画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
①延长OD交
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
②连接AM交BC于点N.
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c29c58065eec3b9d8b33008a5257d37b.png)
即线段AN为所求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(1)依据题意,补全图形:
(2)请回答,得到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c29c58065eec3b9d8b33008a5257d37b.png)
①垂直于弦的直径平分弦所对的劣弧; ②平分弦(不是直径)的直径垂直于弦;
③直径所对的圆周角是直角; ④等弧所对的圆周角相等.
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解答题-证明题
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【推荐2】如图,
是
的直径,
平分
,交
于点D,过点D作直线
,交
的延长线于点E,交
的延长线于点F.
是
的切线;
(2)过点O作
,交
于点H,连接
,若
,
,求
的半径长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](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/3d97cdc586744d208b6f69c9813af977.png)
(2)过点O作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/257d873513c1ba4a1cb78ad9df46667b.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/454328a8e75953fdb0835ce80d9566e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a12c5ba0d51bd636610cd812716cc9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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