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工具:铅笔、三角板、剪刀、胶水。 材料:白卡纸或旧挂历纸、旧画报纸。 做法:1.用纸剪好20个同样大小的正三角形,把正三角形每边三等分,按图1示意,把正三角形相邻两边上的对应点连成虚线,沿虚线把正三角形折成正六边形(折痕在同一面)如图2。 2.取两个正六边形,把它们一边上的一个小三角形互相重合并粘好连在一起,如图3。 3.像图3那样,把五个正六边形相互粘接围成一个正五边形如图4。
Tools: Pencil, set square, scissors, glue. Material: white cardboard or old calendar paper, old newspaper. Practices: 1 paper trimmed the same size of 20 the same triangle, the triangle is equal to each side of the triangle, as shown in Figure 1, the adjacent triangles on both sides of the corresponding points connected into a dotted line along the dotted line to the triangle fold Into a regular hexagon (crease in the same side) shown in Figure 2. 2. Take two regular hexagons, one of them on the side of a small triangle coincide with each other and stick together, as shown in Figure 3. 3. Like Figure 3, the five hexagons are glued together into a regular pentagon as shown in Figure 4.