如图,已知等腰
中,
,以
为直径的
与
交于点E,与
交于点D.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/bd4950d9-7a24-484d-a3ac-733ad6d0498b.png?resizew=129)
(1)求证:
;
(2)若
.
①设
,
的半径为r,求r关于x的函数表达式.
②当
时,求图中阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/bd4950d9-7a24-484d-a3ac-733ad6d0498b.png?resizew=129)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/503668fcc7878c81c664c13fa47cba29.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
①设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1dd8809233c90f66563c34f2164415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d56b19731ffe5d1c74380ee2f9370cba.png)
更新时间:2023-12-14 17:58:56
|
相似题推荐
解答题-证明题
|
较难
(0.4)
解题方法
【推荐1】如图1,已知A、B、C是⊙O上的三点,AB=AC,∠BAC=120°.
(1)求证:⊙O的半径R=AB;
(2)如图2,若点D是∠BAC所对弧上的一动点,连接DA,DB,DC.
①探究DA,DB,DC三者之间的数量关系,并说明理由;
②若AB=3,点C'与C关于AD对称,连接C'D,点E是C'D的中点,当点D从点B运动到点C时,求点E的运动路径长.
(1)求证:⊙O的半径R=AB;
(2)如图2,若点D是∠BAC所对弧上的一动点,连接DA,DB,DC.
①探究DA,DB,DC三者之间的数量关系,并说明理由;
②若AB=3,点C'与C关于AD对称,连接C'D,点E是C'D的中点,当点D从点B运动到点C时,求点E的运动路径长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/db332ec9-06ab-4413-91d0-60eae9d1eb1c.png?resizew=331)
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【推荐2】如图是由小正方形构成的6×6网格,每个小正方形的顶点叫格点,圆O经过A、B两个格点,以及格线上的点C,仅用无刻度直尺在给定的网格中按要求画图(画图过程用虚线表示,画图结果用实线表示)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/ad5f2c0d-8287-46bb-b23f-4dac2885f69d.png?resizew=198)
(1)作劣弧BC的中点M;
(2)在优弧BC上找一点D,使得AD∥BC;
(3)在优弧AC上找一点E,使得
=
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/ad5f2c0d-8287-46bb-b23f-4dac2885f69d.png?resizew=198)
(1)作劣弧BC的中点M;
(2)在优弧BC上找一点D,使得AD∥BC;
(3)在优弧AC上找一点E,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f986c181183d8e7e45655e6c5b5d5b.png)
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【推荐1】如图,在平面直角坐标系中,
,
,
,点
的坐标为
.抛物线
经过
、
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/9a14b04e-4061-488e-bd07-c189f6d27834.png?resizew=149)
(1)求抛物线的解析式;
(2)点
是直线
上方抛物线上的一点,过点
作
垂直
轴于点
,交线段
于点
,使
最大.
①求点
的坐标和
的最大值.
②在直线
上是否存在点
,使点
在以
为直径的圆上;若存在,求出点
的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9171ffb23f225eed11adc5c59bb488e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d2f2e41907e30a4a14035f55e3c37c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/9a14b04e-4061-488e-bd07-c189f6d27834.png?resizew=149)
(1)求抛物线的解析式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
①求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
②在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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【推荐2】如图,
为
的内接三角形,P为
延长线上一点,
为
的直径,过C作
交
于E,交
于F,交
于G.
(1)判断直线
与
的位置关系,并说明理由;
(2)求证:
;
(3)若
的直径为10.
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8b1d421ef63a30c750b3ef671ac65cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a727c20ff8215f239839498752412e92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/24/05a29bec-937f-475b-bfe7-eed75ec08d8c.png?resizew=172)
(1)判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e61620a272dada8d4b9a9fab6379dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1d2652fc9016e6b64b2b78b10c91577.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/025df2a9934b457cf20d91604e430612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9620e97567191461f1a87aebb7b4f69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd618dc4411f678362b81d91867aeaae.png)
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【推荐1】如图,以△ABC的BC边上一点O为圆心的圆,经过A、B两点,且与BC边交于点E,DO⊥BE于点O,连接AD交BC于F,若AC=FC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/27/3f60350c-f81f-41d8-9edf-8a5c2511c9c1.png?resizew=265)
(1)求证:AC是⊙O的切线:
(2)若BF=8,DF=
,求⊙O的半径;
(3)若∠ADB=60°,BD=1,求阴影部分的面积.(结果保留根号)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/27/3f60350c-f81f-41d8-9edf-8a5c2511c9c1.png?resizew=265)
(1)求证:AC是⊙O的切线:
(2)若BF=8,DF=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60cbb271baca5cd015f30e07d9eebfd8.png)
(3)若∠ADB=60°,BD=1,求阴影部分的面积.(结果保留根号)
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【推荐2】(1)【问题探究】
如图1,在正方形
中,点
是边
延长线上一点,
,连接
交
于点O,以点O为圆心,
为半径作
.求证:
是
的切线;
如图2,在菱形
中,点E是边
延长线上一点,
,连接
交
于点
,以点
为圆心的
与
相切于点M.
与
的位置关系为_________________;
②若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f576659bdf1bf0fc3a98eb25c223efd.png)
,求阴影部分面积.
如图1,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/0105d0889f6fa9cb5430cf9e09337173.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.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)
如图2,在菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0105d0889f6fa9cb5430cf9e09337173.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f576659bdf1bf0fc3a98eb25c223efd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
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解题方法
【推荐1】直线
与双曲线
交于
、
两点,
为第三象限内一点.
(1)如图1,若点
的坐标为
.
①
______,点
的坐标为______.
②不等式
的解集为______.
③当
,且
时,求点
的坐标.
(2)如图2,当
为等边三角形时,点
的坐标为
,试求
、
之间的关系式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff717c01ad1c40d88d4ad5ae9f8e12ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d752f80003886f8e6bdcd8e77280450.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/c5db41a1f31d6baee7c69990811edb9f.png)
(1)如图1,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/131ec138fb7a504d8665418aec60716f.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
②不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a69f38cc4b01e5d8d6013650095f8755.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b5e761af39bc1725915c3c9ee7febee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/2020/5/8/2458373215051776/2459120406863872/STEM/0b928f20fac644b19e517c4dd85c268f.png?resizew=431)
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【推荐2】如图1,
分别是
的内角
的平分线,过点
作
,交
的延长线于点
.
(1)求证:
,
(2)如图2,如果
,且
,求
的值;
(3)如果
,求
的度数和
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fb7c9b5376c6d491e743b710bc25701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c4cb99d25fbdab927764478f2e13f5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b1472e121da0ae5550329cfda5f0a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/4/40b2ef22-2e36-4c9b-b492-8dc1f14a0623.jpg?resizew=332)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1b827d84a3a27e86753369956c7c0f.png)
(2)如图2,如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5fc6ead6416492c231c320a5486f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf403422c86231d52c97759b0faae07b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40bcf5c0ccfc3f1a40c4430246edf4c8.png)
(3)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c30583f2a4aca915134f41b452e4e7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e5d9a37c30cfa4902376400ebac5bc.png)
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