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同心多邊形
Author:
何姵葶
GeoGebra
New Resources
三位數除以一位數（二）
異分母分數減法
找出對稱軸
判斷球體
拼砌四邊形
Discover Resources
橢圓軌跡
Apollonius Problem 7 CCP Inversion simple 12
circle
包含除法（1 ÷分數）的副本
西瓦定理
Discover Topics
Perimeter
Fractions
Multiplication
Variance
Congruence