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ex 5
Author:
LAM YU SANG
GeoGebra
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四邉形 (四年級) 教師版
異分母分數減法
兩位數除以一位數(一)
兩組對邊相等的四邊形
球體建築師
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Concept of Similarity 相似的概念
仙后座找北極星1
圆锥曲线
西瓦定理
科赫雪花
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Square
Trapezoid
Optimization Problems
Calculus
Secant Line or Secant