人教版二年级上册第三单元测试题角度试题及答案两套
人教版二年级上册第三单元测试题及答案1一.填一填。(每空2分,共20分)1.一个角有()个顶点,()条边。2.长方形和正方形有()个直角。3.一个直角三角形有()个直角,()个锐角,()个钝角。4.()比直角小,()比直角大。5.角的大小与()无关,与()有关。二.判断下面各题,正确的在()里打“√”,错误的在()里打“×”。(15分)1.一条弯曲的曲线折成的弧度也是角。()2.角的两边越长,角越大。()3.锐角是比直角小的角,钝角是比直角大的角。()4.画一个直角,先确定顶点和一条边,再用三角尺的直角顶点和一条直角边与所画的顶点和一条边对齐,沿着三角尺的顶点和另外一条直角边画一条线,并在直角...
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