如图,在
中,
,点D是
上一点,且
,点O在
上,以点O为圆心的圆经过C、D两点.
与
的位置关系,并说明理由;
(2)若
的半径为3,求
的长.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3fb4883dad04b16aca3ef049f03dac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40a787ca1e07ee24d5db592ed940034a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
2023·江苏扬州·中考真题 查看更多[22]
2023年江苏省扬州市中考数学真题 (已下线)专题12 圆的相关性质、计算与基础证明(36题)-学易金卷:2023年中考数学真题分项汇编(全国通用)(已下线)专题24 圆的有关位置关系(共45题)-学易金卷:2023年中考数学真题分项汇编(全国通用)江苏省徐州市沛县第五中学2023-2024学年九年级上学期期末数学试题2023年湖北省黄冈市中考一模数学试题【43311396】6.2 与圆有关的位置关系-【智乐星中考·中考备战】2024年山东省中考数学精练本2024年山东省济宁市洙泗中学九年级下学期第一次数学中考模拟试题辽宁省沈阳市皇姑区2023-2024学年九年级下学期学情调研数学试题2024年辽宁省沈阳市皇姑区中考一模考前数学模拟预测题2024年辽宁省沈阳市皇姑区中考零模考试数学模拟预测题四川省内江市威远县威远中学校2023-2024学年九年级下学期期中数学试题河南省南阳市第二十一学校2023-2024学年九年级下学期第一次月考数学试题2024年甘肃省天水市甘谷县部分学校九年级下学期一模数学模拟试题2024年山东省济南市平阴县九年级中考一模数学模拟试题辽宁省阜新市海州区实验中学2023-2024学年九年级下学期4月月考数学试题2024学年山东省枣庄市九年级下学期第一次调研考试数学模拟试题2024年山东省枣庄市台儿庄区九年级第一次模拟考试数学试题(已下线)重难点04+圆的基本性质及直线与圆的位置关系(11大题型+满分技巧+限时分层检测)2(已下线)查补重难点07 圆的相关计算与证明-【查漏补缺】2024年中考数学复习冲刺过关(江苏专用)2024年山东省菏泽市鲁西新区中考三模数学试题宁夏回族自治区吴忠市第六中学2023-2024学年九年级下学期期中数学试题2024年福建省厦门市五缘第二实验学校中考二模数学试题
更新时间:2023-06-19 20:27:37
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,已知在
中,两条弦AB和CD交于点P,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb350cb6e6764d2fa68f6c4229c24d34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/12/3d0cb427-881a-4c21-bce3-acf817a843a1.png?resizew=111)
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【推荐2】如图,
的半径为2,
是
的弦,点O到弦
的距离为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae30dca0e947c5bed6dbd0c818090569.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/9420f2c1-29c4-4fbc-ae3b-c2210dc99e60.png?resizew=132)
(1)求弦
的长;
(2)若点C在
上(点C不与
重合),求
的度数.
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae30dca0e947c5bed6dbd0c818090569.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/9420f2c1-29c4-4fbc-ae3b-c2210dc99e60.png?resizew=132)
(1)求弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)若点C在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5725e3e4eb05b32563b4ee1d473756c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
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名校
【推荐1】如图,在△ABC中,∠C=90°,∠BAC的平分线交BC于点D, 点O在AB上,以点O为圆心,OA为半径的圆恰好经过点D,分别交AC、AB于点E、F.
(1)试判断直线BC与OD的位置关系,并说明理由.
(2)若BD=
,BF=3,求⊙O的半径.
(1)试判断直线BC与OD的位置关系,并说明理由.
(2)若BD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbd3e8cf8325999cde03adf845d3dd0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/ba7d0d18-e9db-4eb3-aa02-d15c5c1d7a6a.png?resizew=144)
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(0.65)
【推荐2】在
中,
以
为圆心.
为半径的圆与
有何位置关系?为什么?
(1)r=4cm; (2)r=4. 8cm; (3)r=8cm
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7281b641656a5992abaafb4190ca9afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7c7d46598f6999244061a274fe5f763.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(1)r=4cm; (2)r=4. 8cm; (3)r=8cm
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解题方法
【推荐3】如果一个圆上所有的点都在一个角的内部或边上,那么称这个圆为该角的角内圆.特别地,当这个圆与角的至少 一边相切时,称这个圆为该角的角内相切圆.在平面直角坐标系
中,点E,F分别在x轴的正半轴和y轴的正半轴上.
(1)分别以点A(1,0),B(1,1),C(3,2)为圆心,1为半径作圆,得到⊙A,⊙B和⊙C,其中是∠EOF的角内圆的是 ;
(2)如果以点D(t,2)为圆心,以1为半径的⊙D为∠EOF的角内圆,且与直线y=x有公共点,求t的取值范围;
(3)点M在第一象限内,如果存在一个半径为1且过点 P(2,
)的圆为∠EMO的角内相切圆,直接写出∠EOM的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
(1)分别以点A(1,0),B(1,1),C(3,2)为圆心,1为半径作圆,得到⊙A,⊙B和⊙C,其中是∠EOF的角内圆的是 ;
(2)如果以点D(t,2)为圆心,以1为半径的⊙D为∠EOF的角内圆,且与直线y=x有公共点,求t的取值范围;
(3)点M在第一象限内,如果存在一个半径为1且过点 P(2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
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【推荐1】如图,已知
是
的直径,点C为
上一点,点D在
的延长线上,且
,过点B作
于点H.
是
的切线;
(2)若
的半径为5,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c6c1f324bd9c99e8406d8fd588b5a6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ea1ca8923f09afe381aa95289d8a22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40ac1bda24ec6d46fae4756d5ab3113b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dd37cb3cf01e9473047e6aae99d9300.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1358e073cf900f149bd755b853fd6f7.png)
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解答题-证明题
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(0.65)
【推荐2】如图,已知
内接于
,
为
的直径,
,交
的延长线于点D.
(1)E为
的中点,连接
,求证:
是
的切线;
(2)若
,求
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b455b110a30c1533d0a0657e0e48ac33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/31/77b62bf6-225c-4678-a428-66cf632e3649.png?resizew=155)
(1)E为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe420c07ce33b530869dde98ede00a7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
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解答题-证明题
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适中
(0.65)
名校
【推荐1】如图1,已知在
中,
,以
为直径的
交斜边
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/ea049925-27b9-4a68-a9d4-44dc4101f7a5.png?resizew=624)
(1)若点
为
中点,连接
,求证:
是
的切线;
(2)如图2,
,垂足为
,若
,
,求
H的长:
(3)如图3,
,在
上取一点
,使
,连接
,
,试探究
、
、
之间的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/ea049925-27b9-4a68-a9d4-44dc4101f7a5.png?resizew=624)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790db8e233280bec605fb7b6c3dfb873.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790db8e233280bec605fb7b6c3dfb873.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d14733aa8ee1b11bc861cd581156ea4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0ae50d5993a332b5cddb022eaa6f1e.png)
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解答题-证明题
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适中
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【推荐2】材料一:证明:
.
证明:如图,作∠BAC=∠a,在射线AC上任意取一点D(异于点A),过点D作DE⊥AB,垂足为E.
![](https://img.xkw.com/dksih/QBM/2022/3/23/2942478452219904/2963909219573760/STEM/b021dbb6-a640-4401-9e80-38c58076566d.png?resizew=174)
∵DE⊥AB于点E
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bca0f66a867f3af967be39533700f377.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9562d0abd23d47bd3abfd312c427550.png)
∵在Rt△ADE中,DE2+AE2=AD2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6ea0e23cad59adc4bda023c56bd7d8.png)
∵∠BAC=∠a
∴
.
材料二:学习了三角函数之后,我们知道,在直角三角形中,知道了一个直角三角形的两条边的长或知道直角三角形的一条边的长及其一个锐角的度数,我们可以求出这个直角三角形其它边的长度和其它角的度数;由“SAS”定理可知,如果一个三角形的两条边的长度及其这两条边的夹角的度数知道了,那么这个三角形的第三条边一定可以求出来.
应用以上材料,完成下列问题:
(1)如图,在△ABC中,AC=4,BC=6,∠C=60°,求AB的长.
![](https://img.xkw.com/dksih/QBM/2022/3/23/2942478452219904/2963909219573760/STEM/9db6cb74-0219-4d84-980d-7f3085137708.png?resizew=179)
(2)在(1)题图中,如果AC=b,BC=a,∠C=a,你能用a,b和cosa表示AB的长度吗?如果可以,写出推导过程;如果不可以,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1ec2d7289bc848c59d03ef876073d6.png)
证明:如图,作∠BAC=∠a,在射线AC上任意取一点D(异于点A),过点D作DE⊥AB,垂足为E.
![](https://img.xkw.com/dksih/QBM/2022/3/23/2942478452219904/2963909219573760/STEM/b021dbb6-a640-4401-9e80-38c58076566d.png?resizew=174)
∵DE⊥AB于点E
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b20a9df00aefa1b3a03c00b4071db0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bca0f66a867f3af967be39533700f377.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9562d0abd23d47bd3abfd312c427550.png)
∵在Rt△ADE中,DE2+AE2=AD2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6ea0e23cad59adc4bda023c56bd7d8.png)
∵∠BAC=∠a
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1ec2d7289bc848c59d03ef876073d6.png)
材料二:学习了三角函数之后,我们知道,在直角三角形中,知道了一个直角三角形的两条边的长或知道直角三角形的一条边的长及其一个锐角的度数,我们可以求出这个直角三角形其它边的长度和其它角的度数;由“SAS”定理可知,如果一个三角形的两条边的长度及其这两条边的夹角的度数知道了,那么这个三角形的第三条边一定可以求出来.
应用以上材料,完成下列问题:
(1)如图,在△ABC中,AC=4,BC=6,∠C=60°,求AB的长.
![](https://img.xkw.com/dksih/QBM/2022/3/23/2942478452219904/2963909219573760/STEM/9db6cb74-0219-4d84-980d-7f3085137708.png?resizew=179)
(2)在(1)题图中,如果AC=b,BC=a,∠C=a,你能用a,b和cosa表示AB的长度吗?如果可以,写出推导过程;如果不可以,说明理由.
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解答题-问答题
|
适中
(0.65)
【推荐3】[问题解答]
两个城镇
与一条公路
位置如图①所示.现电信部门需在公路
上修建一座信号发射塔
要求发射塔
到两个城镇
与
的距离之和最短.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/21/2def5e28-9e29-4347-8df0-9cbf2bce2946.png?resizew=540)
解:点
作关于直线
的对称点
连结
,
与直线
的交点即为所求的点
.
点
关于直线
对称,
直线
垂直平分![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2879ee6402867afa92e32b86d088def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad8eba97f18c657eb7bfa83f1447ff54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0729bb33e60fd0bdca989e32c8aa1554.png)
点
即为所求的点。(两点之间线段最短)
请根据以上问题解答,完成下列问题.
[方法运用]如图②,在正方形
中,
点
在边
上,点
在对角线AC上,
(1)当点
是边
的中点时,则
的最小值为 ;
(2)若
求
周长的最小值.
[拓展提升]如图③,在
中,
,AD平分
交
于点
,点
分别在
上,则
的最小值为 .
两个城镇
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8fbc229c957487495bb8cda1d4cfd8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/2023/1/21/2def5e28-9e29-4347-8df0-9cbf2bce2946.png?resizew=540)
解:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c337d520c7f55a17c6d2b618b72a356c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7d857811cbd619f868d951aa7a0ab8.png)
与直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b82066366a82ffb35f3794865d97fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2879ee6402867afa92e32b86d088def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad8eba97f18c657eb7bfa83f1447ff54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0729bb33e60fd0bdca989e32c8aa1554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
请根据以上问题解答,完成下列问题.
[方法运用]如图②,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9953aa30372cd9d60d5b53d90d9414a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a4b9ff478a4350656b627ca87184c92.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/121cd6a4a9b050736ad51eef9927ade6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b05d6899d398fa4202a751d4c8981.png)
[拓展提升]如图③,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd7fe0efadcdeaa3a391722316596b53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/737355fa2cd0dc9d6b91bf04ff851cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/393aecc2fca4218b20b5ca786d272310.png)
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