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正4正8黏合
Author:
Wu Xiao-Ren
GeoGebra
New Resources
空间中两直线的位置关系
画直线等分三角形的面积
漂亮的摇摆曲线
三位數除以一位數（二）
讀磅
Discover Resources
立體圖
任務4
Fractal Spirograph (Fractal Roulette)
圈柱
摺長方形2
圆面积和周长展开示意图
Discover Topics
Sequences and Series
Fractions
Geometry
Matrices
Parallelogram