1 . 我们知道,角的平分线有很多特殊的性质.例如:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/7183e20c-ffff-4a72-86b1-b82eb9b7dde9.png?resizew=365)
(1)如图①,已知
是
的平分线,点A是
上一点,若
,则可以得到
,请说明理由;
(2)发现规律:连结
,则
是等腰三角形.如图②,在等腰三角形
底边的另一侧存在一点D,当
时,请直接写出
与
的数量关系.
(3)请解决下列问题:如图③,等腰
中,
,D是
外一点,
,且
,求证:
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/7183e20c-ffff-4a72-86b1-b82eb9b7dde9.png?resizew=365)
(1)如图①,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a54e7b35c73ee578c4d01479ddb74cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/346890b14e5f2958f66106537bd046d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
(2)发现规律:连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/346890b14e5f2958f66106537bd046d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b47abcacc10f90489c0d52a9e269ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95efaa2bb4dce0f63f4a23e0f29c5aa0.png)
(3)请解决下列问题:如图③,等腰
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c03366e8ad89bbf52a24243e94646fc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/328ac471f7b27c38c4428ea66d5c5d7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9151c842e53603b04451c1faa107119.png)
您最近一年使用:0次
2024-01-15更新
|
76次组卷
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2卷引用:辽宁省鞍山市2023-2024学年八年级上学期期末数学试题
2 . 综合应用
如图1,直线
与x轴交于点B,直线
与x轴交于点
,
、
交于y轴上一点A.
的表达式;
(2)坐标探究:过x轴上一点
,作
于点E,交y轴于点F,求E点坐标;
(3)规律探究:将
将向左平移m个单位长度(
)得到图2,
与y轴交于点P(点P不与A点和C点重合),在
的延长线上取一点Q,使
,连接
交x轴于M点.请探究
向左平移的过程中,线段
的长度的变化情况?
如图1,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2566d21b3d25c7eff896134271fb37c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0eb2cfcdd67e603516c009b3a75f18d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(2)坐标探究:过x轴上一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/986415cd08b88dc74b63dce4cf06e7b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
(3)规律探究:将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8adc17e010e3900524dfe85f2494e080.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/3e0a847fa535931eda43a437c575ed75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4cfef623a9534b5708df5f95f1760a5.png)
您最近一年使用:0次
2024-01-16更新
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207次组卷
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4卷引用:广东省佛山市禅城区南庄镇第三中学2023-2024学年八年级上学期期末数学试题
广东省佛山市禅城区南庄镇第三中学2023-2024学年八年级上学期期末数学试题广东省佛山市禅城区2023-2024学年八年级上学期期末数学试题(已下线)专题1.20 三角形的证明(全章分层练习)(培优练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(北师大版)(已下线)第08讲 专题2 一次函数与几何图形-【帮课堂】2023-2024学年八年级数学下册同步学与练(人教版)