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象限
Author:
李春培
GeoGebra
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兩組對邊相等的四邊形
四邉形 (四年級) 教師版
拼砌四邊形
四邊形的特性
畫出對稱圖形
Discover Resources
數的組合(探究)
Quiz on Compass Bearings 羅盤方位角：測驗
Graph Paper
根據百分率找數量（二）: 例1的副本
S3 WS4.3 Q05(3D圖)
Discover Topics
Solids or 3D Shapes
Isosceles Triangles
Numbers
Upper and Lower Sum or Riemann Sum
Subtraction