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切割正二十面體(直)
Author:
薛鈞聰
GeoGebra
New Resources
兩位數加法
多邊形的面積
球体的体积推导
球体的体积推导（优化版）
空间中两直线的位置关系
Discover Resources
賺賠：例2
函數愛心
上課
P4周界_上
area
Discover Topics
Sequences and Series
Solids or 3D Shapes
Continuity
Intersection
Pythagoras or Pythagorean Theorem