如图,在
中,点
、
在边
上,点
在边
上,
,
,
、
交于点
,
.
(1)求证:
;
(2)当
时,求证:
.
![](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/895dc3dc3a6606ff487a4c4863e18509.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/9953b7b5c647641edbec4c2ab90a65f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac4e5834821241bf9752e7986e0defa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/774d9f123656e48acc840a03b89a216f.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14e97edeb2f63eacd8fd1ea588030cb4.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52224ab3be914837509713e6e3e84708.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45000de1ff40a384ef38f2fa41612f1.png)
![](https://img.xkw.com/dksih/QBM/2021/1/7/2631199898869760/2634567193354240/STEM/83753988-c4ba-4cde-9868-798d89f7644d.png?resizew=325)
2020·上海黄浦·一模 查看更多[7]
上海外国语大学附属外国语学校2020-2021学年九年级上学期一模数学试题上海市虹口区2020-2021学年九年级上学期一模数学试题(已下线)重难点03 几何证明-2021年中考数学【热点·重点·难点】专练(上海专用)(已下线)热点03 几何证明-2021年《三步冲刺中考·数学》(上海专用)之第2步大题夺高分2021年广东省深圳市深圳实验学校中学部九年级下学期3月月考数学试题上海市虹口区2020-2021学年九年级(上)期末数学试卷(一模)上海市民办明珠中学2022-2023学年九年级上学期数学学科期中试卷
更新时间:2021-01-12 15:43:35
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【推荐1】AB是⊙O的直径,BC切⊙O于B,AC交⊙O于D点,过D作⊙O的切线DE交BC于E.求证:CE=BE.
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解答题-证明题
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【推荐2】如图
,
,
、
相交于点
,
交
于点
.
(1)求证:
;
(2)求证:
⊥
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30e50e094cd2849e38859b36aad0b0c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c8dbc31b2e14067ef2f34b4e25f114.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cf5b86308e9f777a6611503ba8d0e9e.png)
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名校
【推荐2】解答下列各题:
(1)解方程:(x+2)(x+3)=2x+16
(2)已知a、b、c均为非零的实数,且满足
,求
的值.
(1)解方程:(x+2)(x+3)=2x+16
(2)已知a、b、c均为非零的实数,且满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f79d4c9fb6f43618697bfffbc11c87b.png)
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解题方法
【推荐1】如图1,在△ABC中,∠ACB=90°,AC=BC,D为AB上一点,连接CD,将CD绕点C 顺时针旋转90°至CE,连接AE.
(1)求证:△BCD≌△ACE;
(2)如图2,连接ED,若CD=
,AE=1,求AB的长;
(3)如图3,若点F为AD的中点,分别连接EB和CF,求证:CF⊥EB.
(1)求证:△BCD≌△ACE;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/30/7271194d-ed04-4126-9930-f0e2ea1e6283.png?resizew=173)
(2)如图2,连接ED,若CD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/30/ce336151-05ac-4f42-a6f6-7c0444ca0a59.png?resizew=173)
(3)如图3,若点F为AD的中点,分别连接EB和CF,求证:CF⊥EB.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/30/909d21f8-5fbe-43a2-815f-814509f31b63.png?resizew=173)
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解答题-作图题
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适中
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【推荐2】如图1,在
中,
,
为斜边
上一点,以
为圆心、
为半径的圆恰好与
相切于点
,与
的另一个交点为
,连接
.
(1)请找出图中与
相似的三角形,并说明理由;
(2)若
,试求图中阴影部分的面积;
(3)小明在解题过程中思考这样一个问题:图1中的
的圆心究竟是怎么确定的呢?请你在图2中利用直尺和圆规找到正确圆心
(不写作法,保留作图痕迹).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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(1)请找出图中与
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(2)若
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(3)小明在解题过程中思考这样一个问题:图1中的
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