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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
球體建築師
兩組對邊相等的四邊形
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
Discover Resources
总5第五题
滑桿
斜率的副本
瓜豆原理——动点跟随
七彩勾股树
Discover Topics
Subtraction
Natural Numbers
Congruence
Surface
Stochastic Process or Random Process