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Author:
马云辉
GeoGebra
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兩組對邊相等和有直角的四邊形
找出對稱軸
兩組對邊相等的四邊形
兩位數除以一位數（一）
三位數除以一位數（一）
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彩虹理髮
Quiz on Factorization of Quadratic Polynomials (Table Method) 因式分解一元二次多項式(表格法)：測驗
三角形全等的理由 – 題2
正多邊形柱體表面積展開圖
平行四邊形
Discover Topics
Arithmetic
Incircle or Inscribed Circle
Trigonometric Functions
Confidence Interval
Reflection