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视觉差，平行线
Author:
汪丽
GeoGebra
New Resources
兩位數除以一位數（一）
找出對稱軸
画直线等分三角形的面积
算柱 (兩位數)
判斷球體
Discover Resources
HKDSE 3D Figures
三角形分割
時鐘與數學
equations of circle 1
跳動的愛心－平面
Discover Topics
Sequences and Series
Histogram
Vectors 2D (Two-Dimensional)
Constructions
Stochastic Process or Random Process