福建省2019年中考数学复习第七章图形的变换第三节图形的对称、平移与旋转好题随堂演练.doc

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1图形的对称、平移与旋转好题随堂演练1. (2018福州质检)下列几何图形不是中心对称图形的是( )A平行四边形 B正方形C正五边形 D正六边形2. (2018德州)下列图形既是轴对称又是中心对称图形的是( )3. (2018广州)如图所示的五角星是轴对称图形,它的对称轴共有( )A. 1 条 B. 3 条 C. 5 条 D. 无数条4. 如图,将一朵小花放置在平面直角坐标系中第三象限内的甲位置,先将它绕原点 O 旋转 180到乙位置,再将它向下平移 2 个单位长度到丙位置,则小花顶点 A 在丙位置中的对应点 A的坐标为( )A. (3,1) B. (1,3) C. (3,1) D. (1,1)5. 如图,矩形纸片 ABCD 中,AB4,BC6,将ABC 沿 AC 折叠,使点 B 落在点 E 处,CE 交 AD 于点 F,则 DF 的长等于( )A. B. C. D.35 53 73 546. (2018江西)如图,在矩形 ABCD 中,AD3,将矩形 ABCD 绕点 A 逆时针旋转,得到矩形 AEFG,点 B2的对应点 E 落在 CD 上,且 DEEF,则 AB 的长为_参考答案1C 2.B 3.C 4.C 5.B 6.3 2

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