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證平行四邊形 (對邊相等)
Author:
W.L. Wong, Albert
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
柱體建築師
算柱 (兩位數)
兩組對邊相等和有直角的四邊形
兩位數加法
Discover Resources
Symetry
等量公理
將數列化為級數（文字）
两次折叠
属于与不属于
Discover Topics
Arithmetic
Poisson Distribution
Curve Sketching
Definite Integral
LCM and GCD