【探究规律】我们有可以直接应用的结论:若两条直线平行,那么在一条直线上任取一点,无论这点在直线的什么位置,这点到另一条直线的距离均相等.
例如:如图1,两直线
,两点H,T在m上,
于E,
于F,则
.
(1)如图2,已知直线
,A、B为直线n上的两点,C,P为直线m上的两点.
请写出图中面积相等的各对三角形:______________________.
【解决问题】:
(2)如图3,在平面直角坐标系中,点D在y轴上,点B在x轴上,点C的坐标是
,
,
平分
,
平分
,分别交
,
,y轴于点E,F,G.
①求证:
;
②若点D,G,B的坐标分别是
,
,
,求点E,F的坐标.
例如:如图1,两直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0205571fa39f343ee5749b78d466bf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2616a1c4165c581cfacf76ca808e53aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1b4af5719b41ea5442ee9255174c964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75533b7cf51b682fc37374fcf29c00c7.png)
(1)如图2,已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0205571fa39f343ee5749b78d466bf0.png)
请写出图中面积相等的各对三角形:______________________.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/30/1034978d-f6f0-4a26-bee1-e6bace756a64.png?resizew=395)
【解决问题】:
(2)如图3,在平面直角坐标系中,点D在y轴上,点B在x轴上,点C的坐标是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cceff0e7d103475c3ba9a2712f373185.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51b89f545616ef48f3706850107ad95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77c3cfc5aee07fef740703f904c3ff93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5c3ca226db5d490fa92bb1b7c8deb14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3139e28714bfc3d5d875d78dd245d2e.png)
②若点D,G,B的坐标分别是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e055995fc8df800e3689d97b3204868d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0e705301752424a492f6277ed7774e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb13bbc5335efc427f9c619a51dae3c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/30/91052a42-f93a-4c9a-abbe-2c0dec2d06fa.png?resizew=191)
更新时间:2023-08-20 15:37:51
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【推荐1】已知在
中,
,记
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和正方形
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的面积为
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①若正方形
的面积为
,求
的值;
②如图
,延长
交
的延长线于点
,连接
,交
于点
,交
于点
.
若
,求
的长.
(2)如图
,分别以
为边向形外作等边三角形
和等边三角形
,记等边三角形
的面积为
,等边三角形
的面积为
.以
为边向上作等边三角形
(点
在
内),连结
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,试探索
与
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9bb036cc381e66033377c07783f5460.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e78c013cb4fc61193b651072d5e15de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
②如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460aa3d83df61f6c411b34412135451.png)
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若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bb5ccceb997622add983ee2dc68522.png)
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(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491fa99ce27f7343c4f6392cb6c50394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13b2ef1b525d302da087241e37387fa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13b2ef1b525d302da087241e37387fa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004104bafb5f30338123d4ea2b7fedde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f454eb26dffd1ea009879feeea23c9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd052a3a559b3d38e972f93a3bbdab57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c21cbb1c2bcbcb8391ac5a879f2ae0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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名校
【推荐2】如图,
为
的直径,点C为
上方一点,点D为
延长线上一点,连接
,
交
于点E,垂足为H,
交
于点F,连接
.
(1)求证:
.
(2)若
.
①求
的长;
②若点A是线段
的中点,求此圆的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6ead98a116d433441c79caf683e655.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45b04cc3e5adaeff6f9e01e29032803.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/18/b604545a-4812-4415-b8a6-f1b212cc42c9.png?resizew=193)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e0372ab874b7a22402858bdbbf0f63b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/947495c5857cba048c867b96892f87ef.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
②若点A是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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