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proof30黃煒皓
Author:
郭亮偉
GeoGebra
New Resources
三位數除以一位數（一）
四邊形的特性
算柱 (兩位數)
兩組對邊相等的四邊形
錐體建築師
Discover Resources
百分數：買賣問題（Java 版）
趙庭浩的GGB電子書
四次函數圖形觀察
circle: line from centre
正立方體展開圖
Discover Topics
Tangent Line or Tangent
Ratios
Integers
Arithmetic Operations
Subtraction