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waaachen
Author:
陳兪宏
waaachen
GeoGebra
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三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
球体的体积推导
四邊形的特性
球體建築師
Discover Resources
領結的角度
HKMO 2008 Question 3 Demonstration (Geometric Construction)
周界(移邊)
门禁系统
Congruent Triangle (ASA)
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Natural Numbers
Cube
Step Functions
Parabola
Root