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Author:
chen mingchuan
GeoGebra
New Resources
拼砌四邊形
兩位數加法
三位數除以一位數（一）
第八周作业
兩組對邊相等的四邊形
Discover Resources
亞瑟的圖像館
拿破侖定理(外拿破侖)證明一
同側AP+BP最小值
拋物線1-焦點法
計算在區域內部的圖形總數的副本
诱导公式五（90°+α）
Discover Topics
Pythagoras or Pythagorean Theorem
Hyperbola
Curve Sketching
General Quadrilateral
Right Triangles