2018_2019学年七年级数学上册第一章丰富的图形世界1.2展开与折叠(第1课时)课件(新版)北师大版.ppt

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2 展开与折叠,第一课时,1.将一个正方体的表面沿某些棱剪开,至少要剪开 条棱,展成的平面图形中含有 个小正方形. 2.下列图形中是正方体的展开图的是( ).,7,6,C,1,2,3,4,1.(2017吉林长春中考)下列图形中,可以是正方体表面展开图的是( ).,答案,1,2,3,4,答案,2.(2017内蒙古包头中考)将一个无盖正方体形状盒子的表面沿某些棱剪开,展开后不能得到的平面图形是( ).,1,2,3,4,答案,3.水平放置的正方体的六个面分别用“前面、后面、下面、上面、左面、右面”表示,如图是一个正方体的平面展开图,若图中“锦”为前面,“似”为下面,“前”为后面,则“祝”表示正方体的 面.,1,2,3,4,4.下图是由6个相同的正方形拼成的图形,请你将其中一个正方形移动到合适的位置,使它与另5个正方形能拼成一个正方体的表面展开图.(请在图中将要移动的那个正方形涂黑,并画出移动后的正方体的表面展开图),答案,

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