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congruent (SS) 2
Author:
Ricky Chan
GeoGebra
New Resources
異分母分數減法
兩位數除以一位數（二）
【案例】2018年全国1卷理科12题
兩位數加法
算柱 (兩位數)
Discover Resources
畢氏定理的證明(三移動)
Version 3
Properties of a Rhombus
跳動的愛心－立體版
圓周公式的應用
Discover Topics
Ellipse
Plane Figures or Shapes
Conditional Probability
Upper and Lower Sum or Riemann Sum
Parallelogram