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ptccs2new3
Author:
Cheung Wing Chuen
GeoGebra
New Resources
四邊形的特性
兩位數除以一位數（二）
三位數除以一位數（一）
球体的体积推导（优化版）
錐體建築師
Discover Resources
Sine Formula 正弦公式
gjh-g02-00 單項乘以兩項差
畢氏定理平移版
立方體截面
拋物線6-包絡線法
Discover Topics
Special Points
Trigonometric Functions
Pyramid
Differential Equation
Quadratic Equations