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2025年中考数学专题复习:正方形问题(含解析)_02中考总复习(2026版更新中)_02-数学-中考总复习_2025中考复习资料_2025年中考数学专题复习(通用版,含解析)

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2025年中考数学专题复习:正方形问题(含解析)_02中考总复习(2026版更新中)_02-数学-中考总复习_2025中考复习资料_2025年中考数学专题复习(通用版,含解析)
2025年中考数学专题复习:正方形问题(含解析)_02中考总复习(2026版更新中)_02-数学-中考总复习_2025中考复习资料_2025年中考数学专题复习(通用版,含解析)
2025年中考数学专题复习:正方形问题(含解析)_02中考总复习(2026版更新中)_02-数学-中考总复习_2025中考复习资料_2025年中考数学专题复习(通用版,含解析)
2025年中考数学专题复习:正方形问题(含解析)_02中考总复习(2026版更新中)_02-数学-中考总复习_2025中考复习资料_2025年中考数学专题复习(通用版,含解析)
2025年中考数学专题复习:正方形问题(含解析)_02中考总复习(2026版更新中)_02-数学-中考总复习_2025中考复习资料_2025年中考数学专题复习(通用版,含解析)
2025年中考数学专题复习:正方形问题(含解析)_02中考总复习(2026版更新中)_02-数学-中考总复习_2025中考复习资料_2025年中考数学专题复习(通用版,含解析)
2025年中考数学专题复习:正方形问题(含解析)_02中考总复习(2026版更新中)_02-数学-中考总复习_2025中考复习资料_2025年中考数学专题复习(通用版,含解析)
2025年中考数学专题复习:正方形问题(含解析)_02中考总复习(2026版更新中)_02-数学-中考总复习_2025中考复习资料_2025年中考数学专题复习(通用版,含解析)
2025年中考数学专题复习:正方形问题(含解析)_02中考总复习(2026版更新中)_02-数学-中考总复习_2025中考复习资料_2025年中考数学专题复习(通用版,含解析)
2025年中考数学专题复习:正方形问题(含解析)_02中考总复习(2026版更新中)_02-数学-中考总复习_2025中考复习资料_2025年中考数学专题复习(通用版,含解析)
2025年中考数学专题复习:正方形问题(含解析)_02中考总复习(2026版更新中)_02-数学-中考总复习_2025中考复习资料_2025年中考数学专题复习(通用版,含解析)
2025年中考数学专题复习:正方形问题(含解析)_02中考总复习(2026版更新中)_02-数学-中考总复习_2025中考复习资料_2025年中考数学专题复习(通用版,含解析)

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关注公众号:陆陆高分冲刺 ~领取:最新版“小中高考-总复习”、最新试卷下载 正方形问题 一阶 方法突破练 1.如图,在正方形网格中有格点A,B,在网格中确定格点 C,D,使得以A,B,C,D为顶点的四边形是正 方形. 2.如图,在平面直角坐标系中, A(−√3,0),B(0,1),平面内是否存在点M,N,使得以A,B,M,N为顶点 的四边形为正方形?若存在,求出M,N两点的坐标;若不存在,请说明理由. 3.如图,抛物线 y=x²−2x−3与x轴交于A,B两点,与y轴交于点C,点P是直线BC下方抛物线上一点, 连接BP,以BP 为边在图示一侧作正方形BPMN,当顶点M或N恰好落在抛物线的对称轴上时,求点 P的坐标. 1关注公众号:陆陆高分冲刺 ~领取:最新版“小中高考-总复习”、最新试卷下载 设问进阶练 5 13 例 如图,抛物线 y= x2− x+1分别与x轴、y轴交于 B,A两点. 6 6 (1)如图①,连接AB,以AB为边向上作正方形ABCD,求点 C的坐标并判断点 C 是否在抛物线上? (2)将抛物线平移,平移后的抛物线的顶点为P,点 Q 为平面内一点,若以A,B,P,Q 为顶点的四边形是面 积为5的正方形,求平移后的抛物线解析式; (3)点M 是抛物线上一点,点H为平面内一点,连接BM,若点G在抛物线的对称轴上,是否存在以点B, M,G,H为顶点且BM为边的四边形是正方形?若存在,求出点M的坐标;若不存在,请说明理由. 2关注公众号:陆陆高分冲刺 ~领取:最新版“小中高考-总复习”、最新试卷下载 综合强化练 1.创新题·探究性试题已知抛物线 L₁:y=x²+2kx+k−2的顶点为M.抛物线 L₂:y=ax²+bx+c(a ≠0)的顶 点为 M'. 感知特例: (1)当k=0 k=0时,抛物线. L₁与抛物线 L₂的部分自变量及其对应的函数值如下表所示: x -1 0 1 2 y=x²+2kx+k-2 -1 -2 — 2 y=ax²+ bx+c(a≠0) 1 2 1 ①抛物线.L₁的 解析式为 ,抛物线L₂的 解析式为 ; ②补全表格; 形成概念: 我们发现(1)中的抛物线 L₁上的点和抛物线 L₂上的点关于直线 y=kx对称,则称抛物线. L₁与抛线物 L₂是关 于k的反射抛物线. 探究问题: (2)若抛物线. L₁与抛线物 L₂是关于k的反射抛物线. ①当 k=1时,M'的坐标为 ; ②在①的基础上,请求出抛物线. L₂的解析式,并在如图的网格中画出抛物线 L₂的图象; ③点 B 是抛物线 L₁上一点,点B的横坐标为1,过点B作x轴的垂线,交抛物线 L₂于点C,分别作点B,C 关于抛物线L₁ 的对称轴对称的点. B',C',连接BC, CC',B'C',BB',当四边形 BB'C'C 为正方形时,求k的值. 作图区 答题区 2.如图,在平面直角坐标系中,抛物线 y=x²−2x−3与x轴交于A,B两点,与y轴交于点C,直线 l:y=kx+b经过点A,C. (1)求直线l的解析式; (2)在第一象限内存在一点 D,使得 △ACD是以 AC 为直角边的等腰直角三角形,求点 D 的 坐标; (3)(抛物线旋转后对应的两点)在直线AC左侧有一点M,将抛物线绕点 M旋转 180°得到新 3关注公众号:陆陆高分冲刺 ~领取:最新版“小中高考-总复习”、最新试卷下载 抛物线,其中点A,C的对应点分别是 A',C',,若以A,C,A',C'为顶点的四边形是正方形,求点 M的坐标. 4关注公众号:陆陆高分冲刺 ~领取:最新版“小中高考-总复习”、最新试卷下载 3.如图,在平面直角坐标系中,已知抛物线 y=ax²+bx−2(a≠0)与x轴相交于A(1,0),B(5,0)两点,与y轴相 交于点 C,点 D 为抛物线的顶点. (1)求抛物线的解析式及点 D 的坐标; (2)求 △BCD的面积; (3)(抛物线上的动点+任意一点)点M为抛物线上一动点,点 N为平面内一点,以A,M,I,N为顶点,AI为 对角线作正方形,是否存在点M,使点I恰好落在对称轴上?若存在,求出点 M的坐标;若不存在,请说明理由. 5关注公众号:陆陆高分冲刺 ~领取:最新版“小中高考-总复习”、最新试卷下载 考向4 正方形问题 一阶 方法突破练 1. 解:作正方形ACBD 和正方形ABC'D'如解图. 2.解:存在. 如解图,①当AB为正方形的边时(定线段为边),当M,N在x轴上方时,过点 M₁作 M₁E⊥y轴于点E,过点 N₁作N₁D⊥x轴于点 D. ∵∠N₁DA=∠BEM₁=∠AOB=90°, ∴∠DN₁A+∠N₁AD=90°. ∵ ∠BAO+∠N₁AD=90°,∴∠DN₁A=∠BAO. 同理可得. ∠M₁BE=∠BAO, ∴∠DN₁A=∠M₁BE=∠BAO. 又∵ N₁A=M₁B=AB, ∴△N₁AD≅△BM₁E≅△ABO(依托一线三垂直模型构造全等三角形). ∵A(- √3 ,0),B(0,1), ∴N D=BE=OA=√3,AD=M E=OB=1, 1 1 ∴M (−1,√3+1),N (−√3−1,√3); 1 1 当M,N在x轴下方时, 同理可得 M (1,1−√3),N (1−√3,−√3); 2 2 ②当AB为正方形的对角线时,作M₃G⊥x轴于点G,过点M₃作M₃F⊥y轴于点 F. 设AG=x,则 OG=√3−x, ∵AB=√OA2+OB2=2,同①可证得 △AGM₃≅△BFM₃, ∴M F=M G=OG=√3−x, 3 3 √2 ∴AM = AB=√2,AM2= AG²+M₃G², 3 2 3 ∴2=x2+(√3−x) 2 , √3+1 √3−1 解得 x = 舍去), x = , 1 2 2 2 ( √3+1 √3+1) (1−√3 1−√3) ∴M − , ,同理可得 N , ,综上所述,符合条件的M,N的坐标为M(-1, √3 3 2 2 3 2 2 ( √3+1 √3+1) (1−√3 1−√3) +1) ,N(−√3−1,√3)或 M(1,1−√3),N(1−√3,−√3)或 M − , ,N , (M,N两点 2 2 2 2 6关注公众号:陆陆高分冲刺 ~领取:最新版“小中高考-总复习”、最新试卷下载 的坐标可互换). 3.解:∵抛物线的解析式为 y=x²−2x−3,∴B(3,0),抛物线的对称轴为直线x=1, ①如解图①,当点 M在对称轴上时,过点 P 作PE 垂直直线x=1于点E,过点 B作BF⊥EP交EP的延长线于 点F, ∵ ∠BPM = 90°,∴ ∠MPE +∠BPF = 90°,又∵∠PBF+∠BPF=90°,∴∠MPE=∠PBF, ∵BP=MP,∠PBF=∠MPE,∠PFB=∠MEP=90°, ∴△PFB≌△MEP,∴PF=ME,BF=PE, 设点P(m,m²-2m-3)(0
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  1. CONNECT:[ UseTime:0.000884s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001536s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000815s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000692s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001306s ]
  6. SELECT * FROM `set` [ RunTime:0.000520s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.001510s ]
  8. SELECT * FROM `wendang` WHERE `id` = 329960 LIMIT 1 [ RunTime:0.001097s ]
  9. UPDATE `wendang` SET `liulancishu` = 2 WHERE `id` = 329960 [ RunTime:0.004897s ]
  10. UPDATE `wendang` SET `lasttime` = 1772321538 WHERE `id` = 329960 [ RunTime:0.001103s ]
  11. SELECT * FROM `wendang` WHERE `id` < 329960 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001227s ]
  12. SELECT * FROM `wendang` WHERE `id` > 329960 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000994s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 329960 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.004434s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 329960 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002386s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 329960 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.006100s ]
0.195284s