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ptcc trigo level 2
Author:
Cheung Wing Chuen
GeoGebra
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畫出對稱圖形
三位數除以一位數（二）
【案例】2013年安徽高考15题
找出對稱軸
兩位數加法
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Polygon Activity
DSE Circle-ACT03C Relationship Between Arcs and Angles at Circumference
Q123
Modular Surface：1 / (1 + z²)
河內塔 (Tower of Hanoi)的副本
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Diagrams
Solids or 3D Shapes
Continuity
Area
Sphere