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菱形六十面體
Forfatter
Ho-Kai Chen
先畫正二十面體, 再由中心點向各面畫出菱形面 ---- In geometry, a rhombic hexecontahedron is a stellation of the rhombic triacontahedron. It is nonconvex with 60 golden rhombic faces with icosahedral symmetry.
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Nye Materialer
三位數除以一位數(一)
第八周作业
判斷球體
三位數除以一位數(二)
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Opdag Ressourcer
Net of a cylinder
Rugby Ball
Box method for multiplication
正四棱錐
乘法的副本
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Bestemte Integral
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Kvadrat
Multiplikation