人教版二年级数学上册-单元测试卷-角的初步认识-第三单元过关检测卷+答案
第三单元过关检测卷一、找一找。(1题8分,2题4分,共12分)1.在角的下面画“√”。2.下面哪些是直角?在直角的下面画“”。二、填一填。(每空1分,共19分)1.一个角有( )个顶点,( )条边。2.要知道一个角是不是直角,可以用三角尺上的( )比一比。3.直角比锐角( );直角比钝角( )。4.长方形有( )个角,都是( )角。5.一个正方体有( )个面,每个面有( )个直角,一共有()个直角。6.一个三角板有( )个角,其中有( )个直角,2个( )角。7.写出下面各角的名称,并比较大小。( )角 ( )角 ( )角( )角
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