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外公切線作圖
Author:
Tone
GeoGebra
New Resources
百分數及其應用
科氏力 (Coriolis Force)
折扣
常见四边形是否是双心四边形
龙形曲线-分形龙
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電子幾何條
二次函數（第一階段） 完成後請下拉至其他階段
九點圓
S2 Angles Related to Rectilinear Figures
随机模拟实验（撒豆子估算π）的副本
Discover Topics
Statistical Characteristics
Straight Lines
Circle
Tangent Line or Tangent
Trigonometric Functions