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圓錐截痕模型
Author:
陳隆期
GeoGebra
New Resources
找出對稱軸
兩組對邊相等的四邊形
球体的体积推导（优化版）
兩組對邊相等和有直角的四邊形
判斷球體
Discover Resources
謝爾賓斯三角形
製作對稱圖_教師示範
選修數學
sin(x) 的函數圖形的副本
moni
Discover Topics
Functions
Algebra
Cone
Perimeter
Upper and Lower Sum or Riemann Sum