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餘弦函數值的變化
Author:
t0759
GeoGebra
New Resources
畫出對稱圖形
球体的体积推导（优化版）
兩組對邊相等的四邊形
兩位數除以一位數（一）
三位數除以一位數（一）
Discover Resources
正三角形的旋轉2
黎曼和
三節棍
变形的正方形
Quiz on Addition and Subtraction of Directed Numbers (1)
Discover Topics
Histogram
Conic Sections
Multiplication
Straight Lines
Combinatorics