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題六
Author:
Tse Sir
GeoGebra
New Resources
畫出對稱圖形
Fibonacci Clock
算柱 (兩位數)
兩組對邊相等的四邊形
四邉形 (四年級) 教師版
Discover Resources
判斷柱體 2
不規則圖形的周界(凹)
四下_面積（一）(學生版)
三角形面積公式B2
〃Two〃
Discover Topics
Plane Figures or Shapes
Difference and Slope
Linear Regression
Conic Sections
Cosine