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错觉2
Author:
谢鹏
GeoGebra
New Resources
百分數及其應用
直線的斜率：水平變化 & 鉛垂變化
盈利與虧蝕
第八周作业
第三周作业效果演示
Discover Resources
方格紙上畫梯形2
animation for kastin
摸似利萨如图形
Escher 階梯 (Penrose Stair)
陳允杰 橢圓反射
Discover Topics
Isosceles Triangles
Arithmetic Operations
Rhombus
Differential Calculus
Linear Programming or Linear Optimization