如图,在
中,
,
,
,点P从A出发,沿
方向以每秒1个单位长度的速度向终点C运动.当点P不与点A、C重合时,将线段
绕点P逆时针旋转
,得到线段
,以
为边作矩形
.点H恰好落在直线
上,设矩形
与
重叠部分的图形面积为S(平方单位),点P的运动时间为t(秒).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/31/84a485dc-1fc1-410f-85a5-af4029828487.png?resizew=164)
(1)证明矩形
的周长是一个定值.
(2)当矩形
为正方形时,求t的值.
(3)在整个运动过程中,存在全等三角形时,求S的值.
(4)矩形
的对角线
和
的交点为M,作点Q关于直线
的对称点N,当
与
的边平行或者垂直时,直接写出此时的t值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b343d129b6c503de764f3dcd96eda9fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb98981c09e13c72e6562da53d304eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb98981c09e13c72e6562da53d304eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/31/84a485dc-1fc1-410f-85a5-af4029828487.png?resizew=164)
(1)证明矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb98981c09e13c72e6562da53d304eee.png)
(2)当矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb98981c09e13c72e6562da53d304eee.png)
(3)在整个运动过程中,存在全等三角形时,求S的值.
(4)矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb98981c09e13c72e6562da53d304eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d58f9019097bd05037aefd5c322916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
更新时间:2023-03-28 09:58:11
|
相似题推荐
解答题-证明题
|
困难
(0.15)
解题方法
【推荐1】在△ADC和△BEC中,AD=CD,BE=CE,∠ADC=∠BEC=90°,且BC<CD,将△BEC绕点C逆时针旋转,连接AB,设点O为线段AB的中点,连接DO和EO.
![](https://img.xkw.com/dksih/QBM/2020/12/18/2616971901739008/2619089569595392/STEM/2e74b0f163554a388b671ad8ab11805a.png?resizew=106)
(1)如图1,当点B在CD边上时,求证:DO=EO,DO⊥EO;
(2) 如图2,在△BEC绕点C逆时针旋转的过程中,当点B 旋转至BC在AC左侧且∠ACB=60°的位置时,(1)中的结论是否成立?若成立,请写出证明过程,若不成立,请说明理由.
(3)在(2)的条件下,若BC=4,CD=
,求OD的长.
![](https://img.xkw.com/dksih/QBM/2020/12/18/2616971901739008/2619089569595392/STEM/93bd8275cb33461a95170d516d214b4f.png?resizew=133)
![](https://img.xkw.com/dksih/QBM/2020/12/18/2616971901739008/2619089569595392/STEM/4670b2fd99884f1fae311bfa0abf18c3.png?resizew=106)
![](https://img.xkw.com/dksih/QBM/2020/12/18/2616971901739008/2619089569595392/STEM/2e74b0f163554a388b671ad8ab11805a.png?resizew=106)
(1)如图1,当点B在CD边上时,求证:DO=EO,DO⊥EO;
(2) 如图2,在△BEC绕点C逆时针旋转的过程中,当点B 旋转至BC在AC左侧且∠ACB=60°的位置时,(1)中的结论是否成立?若成立,请写出证明过程,若不成立,请说明理由.
(3)在(2)的条件下,若BC=4,CD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10e8abf8690e4b129466ddb918bcc94.png)
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【推荐2】定义:在凸四边形中,我们把两组对边乘积的和等于对角线的乘积的四边形称为“完美四边形”.
(1)在正方形、矩形、菱形中,一定是“完美四边形”的是 .
(2)如图1,在“完美四边形”ABCD中,AB=AD=CD=2,BC=
,AC=3,求线段BD的长.
(3)如图2,⊙O内接四边形EFGH,GE为⊙O的直径.
①求证:四边形EFGH为“完美四边形”.
②若EF=6,FG=8,FH是否存在一个值使四边形EFGH的面积最大?若存在,求出FH的值;若不存在,请说明理由.
(1)在正方形、矩形、菱形中,一定是“完美四边形”的是 .
(2)如图1,在“完美四边形”ABCD中,AB=AD=CD=2,BC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
(3)如图2,⊙O内接四边形EFGH,GE为⊙O的直径.
①求证:四边形EFGH为“完美四边形”.
②若EF=6,FG=8,FH是否存在一个值使四边形EFGH的面积最大?若存在,求出FH的值;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/62dc1d3e-ba87-48c8-96cc-7f9ff692f532.png?resizew=249)
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解答题-问答题
|
困难
(0.15)
解题方法
【推荐1】在平面直角坐标系中,点O为坐标原点,正方形
与长方形
的位置如图所示,点A在x轴的正半轴上,点C在y轴的正半轴上,点B的横坐标为a,点D,E在x轴的负半轴上(点E在点D的右侧),点G的坐标为(
,
,实数a,b的值满足
.
(1)求点F的坐标;
(2)长方形
以每秒1个单位长度的速度向右平移
秒得到矩形
,点
分别为点D,E,F,G平移后的对应点,设矩形
与正方形
重合部分的面积为S,用含t的式子表示S,并直接写出相应的t的范围;
(3)在(2)的条件下,在长方形
出发运动的同时,点P从点O出发,沿正方形的边以每秒2个单位长度的速度顺时针方向运动(即
),连接
,
,当三角形
的面积为15时,求
时相应的t值,并直接写出此时刻S值及点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bdb5ff04bc2755b7b4071b1648c183d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72d208386ab7d06a2cc2308c1a3bb9d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70bf1c449101fa336b82e9711f13618c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd42f28c4f35adeabeb0b9d5699bc62.png)
(1)求点F的坐标;
(2)长方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e2a03be25e3c3c531e71043c45fcee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59b7ac746d19826efce9dbc5cef9537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83fa411810f391fceac0f49456cf066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59b7ac746d19826efce9dbc5cef9537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
(3)在(2)的条件下,在长方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bdb5ff04bc2755b7b4071b1648c183d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c846ba450b37707dfc61752a944bcdc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3be451ce5fad246389ccf4864929d81d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89a2e99fcc57f86e684e563997d64ba1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b24cecb337e57792928719c129cb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe8fabd6b7f3547c18062c8781dbd45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/23/c28d31cf-f09d-4793-bf47-680e677749bb.png?resizew=419)
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解答题-作图题
|
困难
(0.15)
【推荐2】如图,在平面直角坐标系中,O是原点,点A在x轴的负半轴上,点B在y轴的正半轴上,
,且线段
的长是方程
的一个根.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/11/4f444455-047e-4309-ad5a-5e9bac71546a.png?resizew=167)
(1)求直线
的函数解析式.
(2)将
绕点O逆时针方向旋转90°得到
,直线
交线段
于点C,点F是直线
上一点,分别过点E、F作x轴和y轴的平行线交于点G,将
沿
折叠,使点G的对应点落在坐标轴上,求点F的坐标.
(3)在(2)的条件下,点M是
中点,点N、P、Q在直线
或者y轴上,是否存在点P,使四边形
是矩形?若存在,请利用备用图画出示意图并直接写出点P的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e21e066bbc7925a59e5bb3fbd78e0cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/146b714d5d11115d20b6b497718fcb6a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/11/4f444455-047e-4309-ad5a-5e9bac71546a.png?resizew=167)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf81da91f4f486850d143c5963abc13f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)在(2)的条件下,点M是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94ac29ad27d621a47fcdd1d47a0b31df.png)
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解答题-证明题
|
困难
(0.15)
【推荐1】如图1,F为正方形
的边
上的一点,以
为斜边在
的上方作等腰直角三角形
,连接
.G,H分别是
的中点,连接
.
(1)线段
与
的关系是______.
(2)如图2,将图1中的
绕点C顺时针旋转,则(1)的结论是否仍然成立?若成立,请证明;若不成立,请说明理由.
(3)若
,将图1中的
绕点C顺时针旋转一周,当B,E,F三点共线时,请直接写出线段
的长.
![](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/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6261790c66cc71ee3898afabad0c09f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a30fd4fbb921322af1262b7dd39f1ab3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fb907cb90c735c33c6b886bf86923e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/5/b23dec2d-2d9b-409f-bc77-d711858b0722.png?resizew=300)
(1)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)如图2,将图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8fe82e04629c091a7addea566db41dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
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解答题-问答题
|
困难
(0.15)
名校
【推荐2】已知如图1,抛物线y=﹣
x2﹣
x+3与x轴交于A和B两点(点A在点B的左侧),与y轴相交于点C,点D的坐标是(0,﹣1),连接BC、AC
![](https://img.xkw.com/dksih/QBM/2019/4/1/2172920142905344/2173359377104896/STEM/3c2a74af91a94eaa8a6fc8bf70171c2c.png?resizew=476)
(1)如图2,若在直线AC上方的抛物线上有一点F,当△ADF的面积最大时,有一线段MN=
(点M在点N的左侧)在直线BD上移动,首尾顺次连接点A、M、N、F构成四边形AMNF,请求出四边形AMNF的周长最小时点N的横坐标;
(2)如图3,将△DBC绕点D逆时针旋转α°(0<α°<180°),记旋转中的△DBC为△DB′C′,若直线B′C′与直线AC交于点P,直线B′C′与直线DC交于点Q,当△CPQ是等腰三角形时,直接写出CP的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69ee3c61d2298e75fc4f1643f8ebc2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://img.xkw.com/dksih/QBM/2019/4/1/2172920142905344/2173359377104896/STEM/3c2a74af91a94eaa8a6fc8bf70171c2c.png?resizew=476)
(1)如图2,若在直线AC上方的抛物线上有一点F,当△ADF的面积最大时,有一线段MN=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
(2)如图3,将△DBC绕点D逆时针旋转α°(0<α°<180°),记旋转中的△DBC为△DB′C′,若直线B′C′与直线AC交于点P,直线B′C′与直线DC交于点Q,当△CPQ是等腰三角形时,直接写出CP的值.
您最近一年使用:0次
解答题-问答题
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困难
(0.15)
名校
【推荐1】如图,在平面直角坐标系中,直线
:
分别交
轴,
轴于点
、点
,点
在
轴的负半轴上,满足
,直线
:
经过点
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/011eb6fa-ef29-4e40-bc55-d26370085ad9.png?resizew=395)
(1)求直线
的解析式及
的值;
(2)在直线
上存在一点
,使得
,求点
的坐标;
(3)若点
是直线
上一动点,且点
在
轴的上方,点
是平面内任意一点,是否存在点
,使以点
为顶点的四边形是菱形.若存在,请直接写出满足条件的点
的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a98e24892abc0eb34d5216d4e89c61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31eec70cf44c972ee1b2e185db9ccc20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/634cfbfa72c819314962cc08fc29ac15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/011eb6fa-ef29-4e40-bc55-d26370085ad9.png?resizew=395)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)在直线
![](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/1d85c8a3265f3fc232ec2508665b62ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91fd6c9f7b7c9fa4822aa81eb13799ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448c19684ea4d1bb9e937aecae8eae7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
解题方法
【推荐2】如图,将
的边
绕点
逆时针旋转得到线段
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/4d17c6e1-d02c-40cc-a63d-d2660fe89139.png?resizew=558)
(1)如图1,连接
,若
,
,
,
,求
的长;
(2)如图2, 点
在
上, 且满足
,连接
,点
为
上一点,连接
交
于点
,若
,
, 求证
;
(3)如图 3, 若
,
,
,点
在直线
上且满足
, 将
沿虚线
折叠使得点
的对应点
落在
上,连接
与折痕
交于点
,请直接写出
最小时,点
到
的距离.
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/4d17c6e1-d02c-40cc-a63d-d2660fe89139.png?resizew=558)
(1)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ff58e0fc7269d3c2fd1b0f80b9cce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df7bf90782fcc4f95cfc58b154996daa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e00668f797c9ce25d0f07e8f4f33a4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)如图2, 点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5adc18ca424552b35ab939e9d57943e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f0816423dff0c19d5723b62df2a2e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb83ce2a14c9ab7e16d3a8db97a28573.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68382641b5e0cbaf624f70126d90ca06.png)
(3)如图 3, 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eee296a7d9fba487f1485c61580196f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d649afbddd907f0dfec1420f02f82fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/068282a29ef83d938714e8d19b963a7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](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/2a99e1ad0d6fb0f13be56d09086366c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次