如图,点
、
在
上,直线
是
的切线,
,连接
交
于点
.
![](https://img.xkw.com/dksih/QBM/2013/7/24/1573671516798976/1573671523131392/STEM/99351acf58b4443fbb61e7ed59dc987f.png?resizew=143)
(1)
与
相等吗?为什么?
(2)若
,
,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/636379c98ab2f291a3c20ff1505b0416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2013/7/24/1573671516798976/1573671523131392/STEM/99351acf58b4443fbb61e7ed59dc987f.png?resizew=143)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9425a4e9d20928dbcf96ba8d1a177469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
更新时间:2016-12-05 18:25:49
|
相似题推荐
解答题-问答题
|
较难
(0.4)
解题方法
【推荐1】【问题情境】定义:如图1,点E在四边形ABCD的边CD上,若AE、BE将四边形ABCD分割成三个相似的三角形,则称点E为该四边形的相似点.
(1)若相似点在四边形ABCD的边CD上, 且AE、BE将四边形ABCD分割成三个正三角形,则四边形ABCD的四边形之比(按边长从小到大排序)为_______ .
(2)若相似点在四边形ABCD的边CD上,且AE、BE将四边形ABCD分割成三个全等的等腰直角三角形,则四边形ABCD的四边形之比(按边长从小到大排序)为_______.
(3)【探索研究】
如图2,点E为四边形ABCD边上的相似点,且AE、BE将四边形ABCD分割成三个全等的三角形,已知∠ABC=90°,AD=AB=BC=2,求边CD的长.
(4)【问题解决】
如图3,在四边形ABCD中,AB∥CD,点E为四边形ABCD的边CD上的相似点,且AD=a,AB=b,BC=c(其中a≠c),此时边CD的长为多少?请用含a、b、c的代数式直接写出所有可能的结果.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/2/b18097ec-24fb-4171-b6bc-33f396015d7f.jpg?resizew=511)
(1)若相似点在四边形ABCD的边CD上, 且AE、BE将四边形ABCD分割成三个正三角形,则四边形ABCD的四边形之比(按边长从小到大排序)为_______ .
(2)若相似点在四边形ABCD的边CD上,且AE、BE将四边形ABCD分割成三个全等的等腰直角三角形,则四边形ABCD的四边形之比(按边长从小到大排序)为_______.
(3)【探索研究】
如图2,点E为四边形ABCD边上的相似点,且AE、BE将四边形ABCD分割成三个全等的三角形,已知∠ABC=90°,AD=AB=BC=2,求边CD的长.
(4)【问题解决】
如图3,在四边形ABCD中,AB∥CD,点E为四边形ABCD的边CD上的相似点,且AD=a,AB=b,BC=c(其中a≠c),此时边CD的长为多少?请用含a、b、c的代数式直接写出所有可能的结果.
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解答题-问答题
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【推荐2】定义:对于数轴上的任意两点
,
分别表示数
,
,用
表示他们之间的距离;对于平面直角坐标系中的任意两点
,
我们把
叫做
,
两点之间的直角距离,记作
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/31/ea0f9f17-6649-417f-a004-98cdfcd70ec8.png?resizew=165)
(1)已知
为坐标原点,若点
坐标为
,则
______;
(2)已知
是直线上
的一个动点,
若
,求点
与点
的直角距离的最小值;
若
是以原点
为圆心,
为半径的圆上的一个动点,请直接写出点
与点
的直角距离的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6abf3f9b0ebcdc47a028c781b7edb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6d50d72790c73c1f1a96888fc490d06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3bcb4828b16c8e845492f1a53ddd9a9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/31/ea0f9f17-6649-417f-a004-98cdfcd70ec8.png?resizew=165)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881fe2df23c5a0fe1d1fecbe9ffa55fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a94598a613725ff7e248c78761ad032b.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31c4f39399ec245a67db2933ed639f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d776a89f4fd29dccffe1040069d59ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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解答题-问答题
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较难
(0.4)
【推荐1】如图,在
中,
,点
分别为
的中点,线段
的垂直平分线交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/10590c3a-d1a2-4adc-a6df-8ee10e9666a5.jpg?resizew=219)
(1)当
时,求线段
的长.
(2)当
取何值时,点
与点
重合.
(3)当
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209526fbf1513321ea91a8c50fd35e91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cca04b2a2b61d62a809776670a60c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/10590c3a-d1a2-4adc-a6df-8ee10e9666a5.jpg?resizew=219)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ff06692c025b869a7bcdcff15dca9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70abed7faf55deb24162255c5ad59577.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐2】如图,在
中,
.动点P从点A出发,以
的速度沿边
向终点B运动.过点P作
交射线AC于点Q.设点P的运动时间为
与
重叠部分图形的面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/89e4ed94-ee2c-45e9-92e8-5169d969b9d6.png?resizew=142)
(1)线段
的长为______
,线段
的长为______
.(用含x的代数式表示)
(2)求y关于x的函数解析式,并写出自变量x的取值范围.
(3)当
时,x的值为______.
(4)当直线
把
分成的两部分图形中有一个是轴对称图形时,直接写出x的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce7f6d278f2ef7a193b7eed7be6b3c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50bd8c0a4545971c611ff2488d517794.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbbd11ff5f019de35a4f836a547c3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d84733f9dc908ceb11459cc2aed580ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b22b047156bdc9ce6ce2605849f9a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c173649973e40904f53077b66d0c57e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/89e4ed94-ee2c-45e9-92e8-5169d969b9d6.png?resizew=142)
(1)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/405554b6a34430029b4bab739d69bca3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/405554b6a34430029b4bab739d69bca3.png)
(2)求y关于x的函数解析式,并写出自变量x的取值范围.
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba81e52cfdd10f934885bf7fb89daa4e.png)
(4)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】已知AB为
的直径,EF切
于点D,过点B作
于点H交
于点C,连接BD.
![](https://img.xkw.com/dksih/QBM/2021/6/3/2734870928318464/2734917337333760/STEM/675d4d0b-e49c-46e6-bec9-a4831fef2136.png)
(Ⅰ)如图①,若
,求
的大小;
(Ⅱ)如图②,若C为弧BD的中点,求
的大小.
![](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/0cd27b64b553f69d1f8f550b9d5b093c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/2021/6/3/2734870928318464/2734917337333760/STEM/675d4d0b-e49c-46e6-bec9-a4831fef2136.png)
(Ⅰ)如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73195c015a6755387ccb10ca46a6e7f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/413d8d82deb8f0ee10703db2bd156921.png)
(Ⅱ)如图②,若C为弧BD的中点,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/413d8d82deb8f0ee10703db2bd156921.png)
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名校
【推荐2】如图,
是
的直径,
是
上一点,过点
作
的切线交
的延长线于点
,
.
的度数;
(2)如图2,
是线段
上的动点,过点
作
的平行线,交
于点
,
,连接
,
,
.
①当
时,求
的长;
②当
为何值时,
.
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/236c134aad7d9a21c49c07e924b9a531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8684a7dfac6f39cfd4d6baf050b30e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bbcd65ceea866dfff7c4e9938c5aa60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb499693aaf6664962039bfabc6d515.png)
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