新北师大版小学四年级下册数学第二单元测试卷及答案
第二单元测试卷(1)时间:90分钟满分:100分分数:一、填空题。(10分)1.一个等腰三角形的一个底角是26°,它的顶角是( )。2.一个三角形中有一个角是45°,另一个角是它的2倍,第三个角是( ),这是一个( )三角形。3.将一个大三角形分成两个小三角形,其中一个小三角形的内角和是( )。4.长方形、正方形是特殊的( )。5.在一个直角三角形中,有一个角是30°,另两个角分别是( )、( )。6.一个等边三角形的边长是9厘米,它的周长是( )厘米。7.三角形的两个内角之和是85°,这个三角形是( )三角形,另一个角是( )。二、判断题。(对的画“√”,错的画...
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