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3d正十二面體
Author:
莊宗達
GeoGebra
New Resources
畫出對稱圖形
球体的体积推导（优化版）
【案例】2018年全国1卷理科12题
錐體建築師
算柱 (兩位數)
Discover Resources
階梯函數
二次函数与一元二次方程和一元二次不等式
perimeter
巴拉拉能量2.0
平方差公式的几何意义
Discover Topics
Arithmetic Mean
Incircle or Inscribed Circle
Trapezoid
Addition
Pyramid