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圓與直線
Author:
RueiYi
GeoGebra
New Resources
四邉形 (四年級) 教師版
畫出對稱圖形
小数 的副本
拼砌四邊形
兩組對邊相等的四邊形
Discover Resources
過圓內c點的弦中點軌跡
同旁內角---垂直平行綫
（三）观察物体
龙形曲线-分形龙
撒针估算面积实验
Discover Topics
Similarity Transformation or Similarity
Straight Lines
Histogram
Ratios
Solids or 3D Shapes