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平行4
Author:
Hui Sir
GeoGebra
New Resources
找出對稱軸
兩組對邊相等的四邊形
画直线等分三角形的面积
畫出對稱圖形
球体的体积推导（优化版）
Discover Resources
三角錐(旋轉，實體、透視)
Rotational symmetry of triangular prism
Ex5D#4
翰林數學_2下_CH4-2_平行四邊形性質
植树问题
Discover Topics
Piecewise Functions
Reflection
Polygons
Linear Programming or Linear Optimization
Hypothesis Testing