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Author:
tan90
GeoGebra
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三位數除以一位數（二）
【案例】2018年全国1卷理科12题
兩位數加法
兩組對邊相等和有直角的四邊形
柱體建築師
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[問題] a² + b² = 1, (c-4)² + (d-2)² = 5，求 ad - bc 最大值？
直線族
正n邊形與圓上點的中點軌跡(解析)
rose
圆锥曲线的生成
Discover Topics
Vectors 2D (Two-Dimensional)
Tangent Function
Secant Line or Secant
Trapezoid
Expected Value