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直角三角形與正三角形
Author:
李春培
GeoGebra
New Resources
判斷球體
兩組對邊相等的四邊形
柱體建築師
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
Discover Resources
葉子型
Test1
畢式定理 (05)
算法复杂度函数
橢圓軌跡
Discover Topics
Tree Diagrams
Arithmetic Operations
Correlation
Median Line
Vectors 2D (Two-Dimensional)