David wants to make an right-angled isosceles triangle prism as shown in Figure 1.
On Figure 2, shade the parts that he needs to form the net of the prism.

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1. 1小聪用一张长方形的硬纸片，画一个棱长为2厘米的正方体表面积展开图，这张长方形纸片的面积至少是 平方厘米．
2. 2Which one of the following is not a net of the cube?
3. 3一个长方形铁皮长30cm，宽25cm，从四个角各切掉一个长为5cm的正方形，然后做成一个无盖的盒子，这个盒子用了多少铁皮？它的容积是多少？
4. 4写出一个侧面展开图是长方形的几何体是 ___ ．
5. 5用一张正方形的纸围成一个圆柱形（接口处忽略不算），这个圆柱的（ ）相等． A. 底面直径和高 B. 底面积和侧面积 C. 底面周长和高