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二年级数学下册六《认识图形》认识直角一课三练（无答案）北师大版.doc

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1第二节 认识直角基础碰碰车知识点 1 直角的认识1找一找，下列图形有几个直角，标出直角符号“1” 。2想一想，画一画，分针和时针成直角的时刻是几时整。知识点 2 锐角和钝角的认识3认一认，连一连。

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