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奠基
Author:
tan90
奠基
GeoGebra
New Resources
兩位數除以一位數（二）
錐體建築師
算柱 (兩位數)
球體建築師
兩位數加法
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畢式定理 (01)
圆锥曲线的第二定义
Frequency Change
Angle Between Two Planes Definition 平面與平面間之交角 定義
串珠
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Similar Triangles
Secant Line or Secant
Cosine
Fractions
Angles