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任意四邊形１比３
Author:
huang910316
數資實驗１
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
兩位數除以一位數（二）
画直线等分三角形的面积
畫出對稱圖形
Discover Resources
內擺線
Prism and Cylinder 3
happy planet
骨牌
不规则平移
Discover Topics
Logic
Numbers
Square
Conditional Probability
Secant Line or Secant