如图,以
的边
为直径作
交边
于点D,恰有
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/17/5a553f77-43e2-4715-9659-a5e740a18fba.png?resizew=154)
(1)求证:
与
相切;
(2)在
上取点E,使得
,若
,
,求阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940699bc6596266f000d99efff2954d4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/17/5a553f77-43e2-4715-9659-a5e740a18fba.png?resizew=154)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10904fb969a560355236707867cd812.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b51ab4ad19d81fde3b1c026b57c2e372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454328a8e75953fdb0835ce80d9566e3.png)
更新时间:2023-10-12 21:25:22
|
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】我们数学八年级上册书本第
页作业题中有这样一道题:把一张顶角为
的等腰三角形纸片剪两刀,分成三张小纸片,使每张小纸片都是等腰三角形.你能办到吗?请画出示意图说明理由.
小明在做此题时发现有多种剪法,图
为其中一种方法示意图.
定义:如果我们把
条线段将一个三角形分成
个等腰三角形,我们把这种分法叫做这个三角形的
等分线图.
显然,如图
所示的剪法是这个三角形的
等分线图.
![](https://img.xkw.com/dksih/QBM/2022/2/21/2921406885224448/2963483394195456/STEM/05282c9b99134f91941d6d0381e96c21.png?resizew=432)
(1)如图
,
为等腰直角三角形,请你画出一个这个
的
等分线的示意图.
(2)请你探究:如图
,边长为
的正三角形是否具有
等分线图.若无,请说明理由;若有,请画出所有符合条件的这个正三角形的
等分线图(若两种方法分得的三角形分别成
对全等三角形,则视为一种.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/332e71982612ea86c28b9f2054b1045c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b398c95494eddc79939f16e66cf4da.png)
小明在做此题时发现有多种剪法,图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
定义:如果我们把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0876215b2fd463d151523cd3c6b447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0876215b2fd463d151523cd3c6b447.png)
显然,如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://img.xkw.com/dksih/QBM/2022/2/21/2921406885224448/2963483394195456/STEM/05282c9b99134f91941d6d0381e96c21.png?resizew=432)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
(2)请你探究:如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,
是等边三角形,过点
作
交
的外角平分线于点
,连接
,过点
作
,交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/1393973e-7b91-41bc-8ab6-47b1a2035dec.png?resizew=182)
(1)求证:
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f47f2b6e8510964c9df2cc058891eb07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c42b59b76eafbbe36f13b2daa60132c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07feb02ac97f2d1e95e769cd0bca93c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/1393973e-7b91-41bc-8ab6-47b1a2035dec.png?resizew=182)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55b6ce55e67f6e95e616eaf1ca3f6f8.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f73973d7393f9da4304b4bae7c40d.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,已知半圆O,AB为直径,P为射线AB上一点,过点P作⊙O的切线,切点为C点,D为弧AC上一点,
连接BD、BC.
(1)求证:∠D=∠PCB;
(2)若四边形CDBP为平行四边形,求∠BPC度数;
(3)若AB=8,PB=2,求PC的长度.
连接BD、BC.
(1)求证:∠D=∠PCB;
(2)若四边形CDBP为平行四边形,求∠BPC度数;
(3)若AB=8,PB=2,求PC的长度.
![](https://img.xkw.com/dksih/QBM/2017/6/13/1707843807797248/1708537853247488/STEM/b720ff87688a461da0af3bce7a16da4c.png?resizew=288)
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解答题-证明题
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(0.65)
真题
【推荐2】如图,已知
为
的直径,点C为圆上一点,
垂直于过点C的直线,交
于点E,垂足为点D,
平分
.
是
的切线;
(2)若
,
,求
的长.
![](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/03902478df1a55bc99703210bccab910.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/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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解答题-证明题
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适中
(0.65)
【推荐1】如图,在
中,
,以点
为圆心,
的长为半径作
,交
于点
,交
的延长线于点
.过点
作
,交
于点
,连接
,
,
.
(1)求证:
是
的切线;
(2)填空:
①当四边形
是周长为20的菱形时,
;
②当
时,四边形
是正方形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb8df9fecaa0b266568ad35fb8f0e019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
(2)填空:
①当四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08c14e87a2bcf7090eab2fea73667d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f79997547fb75e88ad1e2c66989a4a0.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3dcd9161991c027aed30b55f3b7eda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a31c3a9dc3437c6309cec6486ce42c94.png)
![](https://img.xkw.com/dksih/QBM/2020/5/5/2456243042779136/2456852069294080/STEM/a6d584fe-9df9-4575-a464-793afeab1118.png)
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解答题-证明题
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适中
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【推荐2】如图,在△ABC中,∠A=45°,以AB为直径的⊙O交于AC的中点D,连接CO,CO的延长线交⊙O于点E,过点E作EF⊥AB,垂足为点G.
(1)求证:BC时⊙O的切线;
(2)若AB=2,求线段EF的长.
(1)求证:BC时⊙O的切线;
(2)若AB=2,求线段EF的长.
![](https://img.xkw.com/dksih/QBM/2017/1/4/1633719251255296/1633719251656704/STEM/15c4cc87c5fa4594914627513b0f2626.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,在半径为6的⊙O中,弦AB长为6.求弦AB与
所围成的阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ae315242bb949a6248aa856ca9246bf.png)
![](https://img.xkw.com/dksih/QBM/2018/12/18/2099605439422464/2101096357593088/STEM/e6f5727c106f4a499eb36a8ec0d3d219.png?resizew=103)
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解答题-证明题
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适中
(0.65)
【推荐2】已知,△ABC内接于⊙O,
![](https://img.xkw.com/dksih/QBM/2022/3/21/2941151098011648/2964147601219584/STEM/ba662696-9690-4a31-8f04-d50e2427e24b.png?resizew=438)
(1)若∠BAC=45°,
,求⊙O的半径;
(2)若BD、CE分别是△ABC的高,∠BAC=60°,
.
① 求证:B、C、D、E四点在同一个圆上;
②求DE的长。
③当点A从∠ABC=90°开始运动到使∠ACB=90°为止,在这个运动过程中线段DE所经过的区域面积.(直接写出答案)
![](https://img.xkw.com/dksih/QBM/2022/3/21/2941151098011648/2964147601219584/STEM/ba662696-9690-4a31-8f04-d50e2427e24b.png?resizew=438)
(1)若∠BAC=45°,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ac2e11788860424508ea9e80cf89d.png)
(2)若BD、CE分别是△ABC的高,∠BAC=60°,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45cb049453049f9abd861c8101f1eae8.png)
① 求证:B、C、D、E四点在同一个圆上;
②求DE的长。
③当点A从∠ABC=90°开始运动到使∠ACB=90°为止,在这个运动过程中线段DE所经过的区域面积.(直接写出答案)
您最近一年使用:0次