在
中,
,
,以
为直径作
,
交
于点D,点P是
上的一个点.
的中点,
,垂足为E,求证:直线
是
的切线;
(2)如图2,连接
,若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bb3820bab977db734f4335e4fde720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bb3820bab977db734f4335e4fde720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04fb30a9d07e410ac92c34b8ad0133db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727f61b741e4a29b9a50e44eaf9ff106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3c1375c64dceef45846308a418cf7f.png)
2023·福建厦门·一模 查看更多[6]
2023年福建省厦门市第六中学九年级下学期直升模拟数学试题2023年福建省福州市时代华威中学中考二检数学试题(已下线)专题17 几何压轴题-学易金卷:5年(2019-2023)中考1年模拟数学真题分项汇编(全国通用)(已下线)2023年福建二模(几何综合)2023学年贵州省玉屏侗族自治县九年级下学期5月质量监测数学模拟预测题2023年贵州省铜仁市玉屏县中考数学模拟预测题(5月份)
更新时间:2023-03-31 17:45:22
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解答题-证明题
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【推荐1】如图,在
中,
,点D、E、F分别在
边上,且
.
(1)求证:
是等腰三角形;
(2)当
时,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4574a828d324ea1b77a0d15aeee8707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2204cb96c3e97078488fe4169e8b0ae4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/14/346bef4a-f3e7-4423-9b60-57a6c60ee289.png?resizew=81)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d777d15cd733338ecfd0ea63819f62c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3b0b11a80e8b107e55534d7fda9f2b.png)
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【推荐2】2021年4月29日,在我国海南文昌航天发射场,长征五号B遥二运载火箭搭载“天和”核心舱发射升空,开启了星辰大海的全新征程,火箭在上升阶段需要地面雷达观测站的实时观测.如图,火箭从地面
处发射,当火箭到达
点时,从地面
处的雷达站测得
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2bd4f1b3a3f3e534c5c3b39266f1ac8.png)
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【推荐1】如图, 在平面直角坐标系中,
是⊙
上的三个点,
.
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(1)圆心
的坐标为___________;
(2)判断点
与
的位置关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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(2)判断点
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【推荐1】如图,
为
的直径,C为
外一点,
交
于点D,E为
的中点,且
.
为
的切线;
(2)若
,求
的值.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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(2)若
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【推荐2】如图,△BCD内接于⊙O,BD是直径,DA是△BCD外角的平分线. AE⊥CD交CD的延长线于E,
(1)求证:AE是⊙O的切线;
(2)若∠DBC=30°,DE=1cm,求BD的长.
(1)求证:AE是⊙O的切线;
(2)若∠DBC=30°,DE=1cm,求BD的长.
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【推荐1】已知:如图,在
中,
,
.求:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/fda1433e-938e-4a23-9e27-8d20d10cd0d2.png?resizew=182)
(1)
;
(2)
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7608906dfa02b9db087ca11c2808551.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/fda1433e-938e-4a23-9e27-8d20d10cd0d2.png?resizew=182)
(1)
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(2)
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名校
【推荐2】如图,在每个小正方形的边长均为1的方格纸中,有线段
和线段
,点
、
、
、
均在小正方形的顶点上.
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(1)在方格纸中画出以
为一边的
,且
的面积为3,
,点
在小正方形的顶点上;
(2)在方格纸中画出以
为对角线的
,
的周长为
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