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正弦定理
Author:
yuchengda
GeoGebra
New Resources
兩組對邊相等的四邊形
兩位數除以一位數（二）
異分母分數減法
判斷球體
找出對稱軸
Discover Resources
简易立体几何
平行四邊形的面積教材一
畢氏定理拼圖007(8片)
固定周界的矩形
等線段作圖
Discover Topics
Perimeter
Reflection
Statistical Characteristics
Sphere
Differential Equation