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两个正四面体
Author:
钟古思
GeoGebra
New Resources
判斷球體
拼砌四邊形
兩組對邊相等的四邊形
錐體建築師
三位數除以一位數（一）
Discover Resources
line equation
生活中的平面圖形關係─相似
中垂線
我的傑作
黃金三角形
Discover Topics
Random Variables
Planes
Trigonometric Functions
Scatter Plot
Complex Numbers