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正八面體
Author:
侯杰材
正八面體
GeoGebra
New Resources
四邊形的特性
兩組對邊相等的四邊形
找出對稱軸
拼砌四邊形
判斷球體
Discover Resources
蒙日定理
特別角的三角函數值(1)
邊長與三角形
集合间基本关系(wd)
楼梯
Discover Topics
Addition
Limits
Sequences and Series
Symmetry
Combinatorics