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内外弦图
Author:
王彤
GeoGebra
New Resources
兩位數除以一位數（二）
畫出對稱圖形
四邊形的特性
算柱 (兩位數)
判斷球體
Discover Resources
不規則圖形的周界(step3)
長方形面積
正方形堆垛
百分數化分數
AMC
Discover Topics
Plane Figures or Shapes
Scalene Triangles
Logic
Constructions
Solids or 3D Shapes