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proof30黃煒皓
Author:
郭亮偉
GeoGebra
New Resources
三位數除以一位數（二）
球體建築師
柱體建築師
三位數除以一位數（一）
兩位數加法
Discover Resources
鏡射
內公切線段長求法
trapezoid2
四邊形面積問題
正多面體
Discover Topics
Cuboid
Incircle or Inscribed Circle
Addition
Planes
Means