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相似三角形
Author:
gklwong
Topic:
Similar Triangles
相似三角形
GeoGebra
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球体的体积推导（优化版）
【案例】2018年全国1卷理科12题
兩位數加法
畫出對稱圖形
兩位數除以一位數（二）
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由拉線80137螢橋國中
Plainmeter explained
圓錐曲線Conic
Quiz on Mixed Arithmetic Operations of Positive Integers 正整數四則混合運算：測驗
(008)80102
圓錐截痕模型
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Cylinder
Quadratic Equations
Constructions
Incircle or Inscribed Circle
Secant Line or Secant