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Clock
Author:
Tsang Kin Fun Francis
You can move the hands freely on the clock ...
GeoGebra
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小数 的副本
畫出對稱圖形
拼砌四邊形
美國國旗 (Claude 版)
四邉形 (四年級) 教師版
Discover Resources
面積與公式
小數（小四下）
Origami-Trisect An Angle
畢氏定理(等面積變形法)
max2
Fraction(2)
Discover Topics
Square
Differential Calculus
Rotation
Symmetry
Upper and Lower Sum or Riemann Sum