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蝴蝶定理
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
四邉形 (四年級) 教師版
判斷球體
錐體建築師
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
Discover Resources
惡靈古堡保護傘
Name the prism 1
固定周界長方形的面積變化（二）
禪繞畫2
旋轉線段
Discover Topics
Difference and Slope
Constructions
Random Experiments
Quadratic Equations
Arithmetic Mean