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不規則圖形的周界(intro)
Author:
WYC
GeoGebra
New Resources
拼砌四邊形
兩位數除以一位數（二）
錐體建築師
兩組對邊相等的四邊形
異分母分數減法
Discover Resources
Chapter02
circle
GGB6
圓周 (圖形C) 的複本
两次折叠
Discover Topics
Mathematics
Indefinite Integral
Rotation
Linear Equations
Interest Calculation