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楔块双面自锁
Author:
zhangkm
Topic:
Triangles
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩位數加法
三位數除以一位數（一）
畫出對稱圖形
拼砌四邊形
Discover Resources
碎形
複合圖形(八)
數學傳播39卷4期, 平面幾何公式思考
congruent (SA) 2
面积
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Hyperbola
Parametric Curves
Circle
Differential Equation
Solids or 3D Shapes