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圓定理2.1
Author:
kinying1
GeoGebra
New Resources
三位數除以一位數（一）
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
錐體建築師
算柱 (兩位數)
Discover Resources
費式數列
Escher 階梯 (Penrose Stair)
弓形塗顏色
congruent triangle_provided by Mr Yeung Kar Chun
三视图
Discover Topics
Kite
Natural Numbers
Numbers
Definite Integral
Multiplication