如图,在直角
中,
边上有E,D,F三点,
,
,
,垂足为F.
为中线的三角形是 ;以
为角平分线的三角形是 ;以
为高线的钝角三角形有 个;
(2)若
,求
的度数.
![](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/532aece6cfd67e2a97977eed978dbf2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc8c4f6e8d4d21439ee0f7f3a64e77c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdf23e73ae2a15c04bbed3981cb8e511.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19766bbdc2d23ae20e9f34530c3a1543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7db0641078052bf1af17b4c5a01b9ccc.png)
21-22七年级下·福建泉州·期末 查看更多[6]
福建省泉州市丰泽区2021-2022学年七年级下学期期末数学试题山西省朔州市右玉县2022-2023学年八年级上学期第一次月考数学试题贵州省黔南布依族苗族自治州长顺县教育局教研室2022-2023学年八年级上学期9月月考数学试题(已下线)第十一章 三角形 单元过关检测01-2022-2023学年八年级数学上册同步考点知识清单+例题讲解+课后练习(人教版)安徽省合肥市部分学校2022-2023学年八年级上学期月考数学试题(已下线)北师大版七年级期末真题必刷易错60题(59个考点专练)-2023-2024学年七年级数学下学期考试满分全攻略高频考点+重难点讲练与测试(北师大版)
更新时间:2023-01-07 19:37:24
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解答题-问答题
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适中
(0.65)
名校
【推荐1】如图,在
中,
是高,
,
是角平分线,它们相交于点O.
,
,求
的度数.
(2)若
,
,则
的值.(用含α、β的式子表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a76ffd241623ec4ee9fd08876464def3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e7106619c08f2bcc1d21f846e8a0de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/597ce705d3a2fe04d29de9e81ec6250d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3a06341e618d64c5086ba5fbdcba47e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e7106619c08f2bcc1d21f846e8a0de.png)
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解答题-计算题
|
适中
(0.65)
名校
【推荐2】如图所示,在
中,
是角平分线,
是高.
,求:①
的度数;②
的度数.
(2)已知
,则
(用
表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721c75fcd58d3d54260aad0f82e09e37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e7106619c08f2bcc1d21f846e8a0de.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47907fb45986bdf39897b4637e06096f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e910dce5a57ff0d917e0b4dd620214.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c4dc54b5695b1dbb42c1f92bc650c41.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】如图,在4×4的方格中,点A,B,C为格点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/9/6930f072-126c-4e32-bdcc-3eea89168b1e.png?resizew=335)
(1)利用无刻度的直尺在图1中画△ABC的中线BE和重心G;
(2)在图2中标注△ABC的外心O并画出外接圆及切线CP.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/9/6930f072-126c-4e32-bdcc-3eea89168b1e.png?resizew=335)
(1)利用无刻度的直尺在图1中画△ABC的中线BE和重心G;
(2)在图2中标注△ABC的外心O并画出外接圆及切线CP.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在
中,
,
是
边上的中线,
是
上一点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/d15312ed-f2d1-423e-bc23-d119db3fe805.png?resizew=190)
(1)求证:
;
(2)若
,求
的度数.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c056a26c993ab806c603f063f78da923.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/d15312ed-f2d1-423e-bc23-d119db3fe805.png?resizew=190)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105068b25f5a63af32f4082cfe08691e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6bb2556fbc0c5187e56c9f6384540.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】如图,在
中,
,
是
上的高,
![](https://img.xkw.com/dksih/QBM/2020/10/26/2579589067014144/2585166029668352/STEM/640092edabfe4bc3980ee380c83d8fa8.png?resizew=118)
(1)若
,求
的度数;
(2)若
,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
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(1)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62491513852e65f93c804105c2af5920.png)
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您最近一年使用:0次
解答题-作图题
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适中
(0.65)
【推荐1】(1)如图,在7×6的方格中,△ABC的顶点均在格点上.试只用不带刻度的直尺,按要求画出线段EF(E,F均为格点),各画出一条即可.
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(2)如图,△ABC的顶点均在正方形网格格点上.只用不带刻度的直尺,作出△ABC的角平分线BD(不写作法,保留作图痕迹).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/435a2bc4-4d2d-4bd1-b938-9626366138a2.png?resizew=426)
(2)如图,△ABC的顶点均在正方形网格格点上.只用不带刻度的直尺,作出△ABC的角平分线BD(不写作法,保留作图痕迹).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/59a6feed-7977-4a2e-a088-9bfeca17c362.png?resizew=140)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】已知,圆内接四边形
的对角线
交于点
,
平分
.
(1)如图1,求证:
是圆的直径;
(2)如图2,
点为圆的圆心,过点
作
,使
,交
的延长线于点
,若
,
,求
半径的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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您最近一年使用:0次