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斜截式
Author:
Louis，Hong
GeoGebra
New Resources
双心四边形
常见四边形是否是双心四边形
平行線的判定
百分數及其應用
异形操场
Discover Resources
斜率 - 概念及定義 (1)
Pappus古定理證明
horizontal
對稱之美
基本不等式
Discover Topics
Addition
Fractions
Isosceles Triangles
Incircle or Inscribed Circle
Calculus