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折角平分线
Author:
孙逸旻
拖动点A，折叠纸片，使AC与BC重合
GeoGebra
New Resources
四邊形的特性
找出對稱軸
拼砌四邊形
直角坐標平面上的旋轉變換
四邉形 (四年級) 教師版
Discover Resources
平行四邊形之變奏I
Riemann Sums
軌跡一︰移動點與一固定點保持固定距離(圓)
Internal tangent
拖拉小正方体
Discover Topics
Angles
Statistics
Algebra
Constructions
Coordinates