四年级下册数学同步练习-7单元3课时-三角形的内角和-苏教版解析
http://t.cn/Ri466E4苏教版小学数学四年级下册《三角形内角和》同步练习及参考答案一、选择1、把一个大三角形分成两个小三角形,每个小三角形的内角和是()A.90°B.180°C.60°【考点】:三角形的内角和.【解析】:根据三角形的内角和是180°,三角形的内角和永远是180度,你把一个三角形分成两个小三角形,每个的内角和还是180°据此解答。【答案】解:因为三角形的内角和等于180°,所以每个小三角形的内角和也是180°。故选:B【总结】:本题考查了三角形内角和定理,属于基础题,关键是掌握三角形内角和为180°。2、在能组成三角形的是()A.90°50°40°B.100°32°...
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