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Author:
ken cheng
GeoGebra
New Resources
找出對稱軸
兩組對邊相等的四邊形
兩位數除以一位數（二）
四邊形的特性
直角坐標平面上的旋轉變換
Discover Resources
色彩視覺藝術：內心與旁心
複合棒形圖2
circle
國旗腳踏車
第一次尝试
Discover Topics
Congruence
Continuity
Pythagoras or Pythagorean Theorem
Linear Programming or Linear Optimization
Frequency Distribution