【问题原型】如图①,在
中,点D是
的中点,连接
,
.求证:
.请补全证明过程.
证明:如图①,点D是
的中点(已知),
∴
(中点定义).
∵
(已知),
∴
(等量代换).
∴
______,
______.(____________)(填推理依据)
∵
,
∴
,
∴
.
【结论应用】如图②,
中,点D是
的中点,连接
,将
沿
翻折得到
,连接
,交
于点O,连接
.请判断
与
的位置关系,并说明理由.
【应用拓展】如图③,在
中,
,点E是边
的中点,连接
,将
沿
翻折得到
,连接
并延长,交
于点F.若
,
,
,则
的长为______.
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71622531dfa894f21b2da123d020d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
证明:如图①,点D是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e57b8d5431911e666c3cea02e63f7f03.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71622531dfa894f21b2da123d020d24.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714521e7f5d4f617b5d6aa2d6e1ab178.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386cda9f96731510d52ec18199e18286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/224efa56edbd3f01436b25c3e66adb50.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a27c8546309e5a92fe2bd3130d08369.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b80dc5584ecf9dfb88b83a6870d2a363.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
【结论应用】如图②,
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172f1b400d9ddec4ea01f6fd040b3802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
【应用拓展】如图③,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ee7149bd58649b5c8b84439e118e53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34dbf33492e5223df78dea34a24ae015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12daf5fea89631b84f896939c503d88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9242d851886840151e43c2b52a92ed9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/c6982b45-3328-4908-bdaf-d26417376bd9.png?resizew=617)
更新时间:2023-02-02 13:46:48
|
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28971fe3e3f9d3849400e98b46fc3ba.png)
(2)如图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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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(3)如图2,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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【推荐2】如图,在△ABC中,AB=AC.点D,E分别在AB,AC边上,点F在AC边的延长线上,且BD=CE=CF.
(1)连接DE,判断DE与BC的位置关系,为什么?
(2)连接DF交BC于点G.判断DG与GF的数量关系,并说明理由.
(1)连接DE,判断DE与BC的位置关系,为什么?
(2)连接DF交BC于点G.判断DG与GF的数量关系,并说明理由.
![](https://img.xkw.com/dksih/QBM/2020/1/10/2373828932681728/2374124089835520/STEM/09d3b83ae6714f2bb2165c9b77212daf.png?resizew=139)
您最近一年使用:0次
解答题-问答题
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(0.4)
【推荐1】如图,在△ABC中,AB=AC.点D,E分别在AB,AC边上,点F在AC边的延长线上,且BD=CE=CF.
(1)连接DE,判断DE与BC的位置关系,为什么?
(2)连接DF交BC于点G.判断DG与GF的数量关系,并说明理由.
(1)连接DE,判断DE与BC的位置关系,为什么?
(2)连接DF交BC于点G.判断DG与GF的数量关系,并说明理由.
![](https://img.xkw.com/dksih/QBM/2020/1/10/2373828932681728/2374124089835520/STEM/09d3b83ae6714f2bb2165c9b77212daf.png?resizew=139)
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【推荐2】如图1,分别以
的
、
为斜边间外作等腰直角三角形
和等腰直角三角形
,点
是
的中点,连接
、
.
![](https://img.xkw.com/dksih/QBM/2021/5/8/2716620484075520/2720999503929344/STEM/ee4c6aae-a4f3-4c22-a10f-dba432295753.png?resizew=584)
(1)求证:
;
(2)如图2,若
,
,
,求
的正切值;
(3)如图3,以
的
边为斜边问外作等腰直角三角形
,连接
,试探究线段
、
的关系,并加以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://img.xkw.com/dksih/QBM/2021/5/8/2716620484075520/2720999503929344/STEM/ee4c6aae-a4f3-4c22-a10f-dba432295753.png?resizew=584)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4194d8a5a22a07db381b3a28d66e3ab6.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4346641491fc90d125ebbd06343382a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d74465c34ad7afa5d39d9e300bdf86.png)
(3)如图3,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
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解答题-证明题
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【推荐1】已知:如图,四边形
内接于
,连接
,
平分
.
![](https://img.xkw.com/dksih/QBM/2023/4/22/3222216916738048/3227075991404544/STEM/735bd2814b384b95aa54e2c2b13695c8.png?resizew=424)
(1)如图1,求证:
;
(2)如图2,连接
并延长,交
于点E,求证:
;
(3)如图3,连接
,
,
,若
的面积为30,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://img.xkw.com/dksih/QBM/2023/4/22/3222216916738048/3227075991404544/STEM/735bd2814b384b95aa54e2c2b13695c8.png?resizew=424)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc93e193fad261689949a52819753f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45b04cc3e5adaeff6f9e01e29032803.png)
(3)如图3,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc5df62e8ac9c74a46462519b95479a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6548e64daac2f8764c002ea2d7830d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
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解题方法
【推荐2】【操作发现】
![](https://img.xkw.com/dksih/QBM/2021/6/29/2753660790931456/2759152591110144/STEM/ee7bf2f1-0d93-4c94-8e1f-42c505cfc101.png)
![](https://img.xkw.com/dksih/QBM/2021/6/29/2753660790931456/2759152591110144/STEM/5b04763b-1988-4883-899b-21ea37d95edb.png)
(1)如图1,在边长为1个单位长度的小正方形组成的网格中,
的三个顶点均在格点上.
①请按要求画图:将
绕点
按顺时针方向旋转90°,点
的对应点为
,点
的对应点为
;
②连接
,此时
______°;
【问题解决】
在某次数学兴趣小组活动中,小明同学遇到了如下问题:
(2)如图2,在等边
中,点
在内部,且
,
,
,求
的长.
经过同学们的观察、分析、思考、交流,对上述问题形成了如下想法:将
绕点
按顺时针方向旋转60°,得到
,连接
,寻找
、
、
三边之间的数量关系.…请参考他们的想法,完成该问题的解答过程;
【学以致用】
(3)如图3,在等腰直角
中,
,
为
内一点,且
,
,
,求
;
【思维拓展】
(4)注意:从以下①②中,你任意选择一道题解答即可.
①等腰直角
中,
,
为
内部一点,若
,则
的最小值=______
②如图4,若点
是正方形
外一点,
,
,
,求
的度数.
![](https://img.xkw.com/dksih/QBM/2021/6/29/2753660790931456/2759152591110144/STEM/ee7bf2f1-0d93-4c94-8e1f-42c505cfc101.png)
![](https://img.xkw.com/dksih/QBM/2021/6/29/2753660790931456/2759152591110144/STEM/5b04763b-1988-4883-899b-21ea37d95edb.png)
(1)如图1,在边长为1个单位长度的小正方形组成的网格中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
①请按要求画图:将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c578d3a17de6f47abaaeca5ab778e7f.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80e435d643780ed87871dcc27fadda45.png)
【问题解决】
在某次数学兴趣小组活动中,小明同学遇到了如下问题:
(2)如图2,在等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491c3a4f72b84ebadd28b90711435adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eea78bf026d76f1cb9cc3dc9349a193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d61fb3b92bd08707aca2f3e31ae16a68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
经过同学们的观察、分析、思考、交流,对上述问题形成了如下想法:将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f8c0c8a16d9e56d7db6a9d8657faf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a99e1ad0d6fb0f13be56d09086366c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
【学以致用】
(3)如图3,在等腰直角
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3015db5ca1f49bb7bad43657e06863ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ced8225ff27c8e3e1897b8629312d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942a9a6bde4a5b9803b68b1e9065de62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
【思维拓展】
(4)注意:从以下①②中,你任意选择一道题解答即可.
①等腰直角
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643bd6c1545b531e70f05913dc28bda0.png)
②如图4,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491c3a4f72b84ebadd28b90711435adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08aa6fd52f3933cbded9ce8c880b4a10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a04260d53a143dac4b4f7a8528e1a7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐1】在平面直角坐标系
中,对于线段
和点
,给出如下定义:若在直线
上存在点
,使得四边形
为平行四边形,则称点
为线段
的“关联点”.已知
,
.
(1)在
,
,
,
中,线段
的“关联点”是___________;
(2)若点
在第二象限且点
是线段
“关联点”,求线段
长度
的取值范围;
(3)已知正方形
边长为1.以
为中心且各边与坐标轴垂直或平行,点
,
在线段
上(
在
的下方).若正方形
上的任意一点都存在线段
,使得该点为线段
的“关联点”,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.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/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/712d9d9e29645c1df6ae23125b4aa1cc.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/215cf9cfac95af95708707f14438675f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8159754fa962579d7dcb79da0ba1908.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/24/0a74b74e-39a3-40e9-9523-ed8c4d957551.jpg?resizew=248)
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a80b19d4b513a1b04728736733e83af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6ba94f77c5c1e61846d47ade2feaf9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9f9311e904b5806b8743f2cfdaa61c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b5ccc27a2edd2d659f8cd41b89938f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)若点
![](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/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
(3)已知正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91703e4c290fba7adf9e9718b7d364f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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解答题-问答题
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较难
(0.4)
【推荐2】在平面直角坐标系中,抛物线
与x轴交于点A,B(点A在点B的左侧),与y轴交于点C,且点A的坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/3414dffb-d6d3-41de-8786-b0ad447ef0d4.png?resizew=302)
(1)求点C的坐标;
(2)①如图1,若点P是第二象限内抛物线上一动点,求点P到直线AC距离的最大值;
②如图2,若点Q为抛物线对称轴上的一个动点,当
时,求点Q的坐标;
(3)如图2,若点M是抛物线上一点,点N是抛物线对称轴上一点,是否存在点M使以A,C,M,N为顶点的四边形是平行四边形?若存在,请直接写出点M的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423ab7bbb5c6e836058758652f174e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a74abf9ace0ba17d365ee0d3f952ebfa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/3414dffb-d6d3-41de-8786-b0ad447ef0d4.png?resizew=302)
(1)求点C的坐标;
(2)①如图1,若点P是第二象限内抛物线上一动点,求点P到直线AC距离的最大值;
②如图2,若点Q为抛物线对称轴上的一个动点,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b12b6d1e4fc6fce56bf1bd6d4e41ae1.png)
(3)如图2,若点M是抛物线上一点,点N是抛物线对称轴上一点,是否存在点M使以A,C,M,N为顶点的四边形是平行四边形?若存在,请直接写出点M的坐标;若不存在,请说明理由.
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