二年级数学下册六《认识图形》长方形与正方形课课练北师大版.doc

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1长方形与正方形1、填一填。1. 长方形有( )个角,最大的那个角是( )角,有( )条边,对边( ) 。2. 正方形有( )个角,每个角都是( )角,有( )条边,四条边都( ) 。3. ( )是特殊的长方形。4. 下面图形中,是长方形的是( ) ,是正方形的是( ) 。二、判断。 (1)数学课本的封面是长方形。 ( ) (2)红领巾的面不是三角形。 ( ) (3)魔方的面是长方形。 ( ) (4)长方形比正方形大。 ( ) 3、在下面的方格纸上画一个长方形和一个正方形。四、下面各图是什么图形?沿虚线连续对折两次后又是什么图形? 源( ) ( ) ( )对折后是 对折后是 对折后是 ( ) ( ) ( )2参考答案一、1. 4,直,4,相等。2. 4,直,4,相等。3. 正方形。4. ,。二、(1) (2) (3) (4) 三、(答案不唯一)四、长方形长方形 正方形正方形 正方形三角形

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