三年级数学下册二《图形的运动》轴对称图形课课练北师大版.doc

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1轴对称图形一、在轴对称图形下面的括号里打“” ,否则打“” 。( ) ( ) ( )( ) ( ) ( )2.下面图形中的虚线是它的对称轴吗?是的画“” ,不是的画“” 。三、选择。(1)正方形有( )条对称轴。A.1 B.2 C.3 D4(2)下面的图形中, ( )不是轴对称图形。A.等边三角形 B.半圆 C.长方形 D.平行四边形(3)圆是轴对称图形,它有( )条对称轴。A.无数 B.2 C.1 D.4(4)下面的图形中, ( )只有 1 条对称轴。四、下面的图案分别是从哪张纸上剪下来的?请你连一连。2参考答案一、 二、 三、 (1)D (2)D (3)A (4)A四、3

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