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内凹的正方形
Author:
陈宜红
Topic:
Plane Figures or Shapes
GeoGebra
New Resources
异形操场
平行線的判定
第三周作业效果演示
科赫雪花
直線的斜率：水平變化 & 鉛垂變化
Discover Resources
Geometric Circle
數據分析（1）
周界2
Copy of 劉徽的「割圓術」
blue
Discover Topics
Pythagoras or Pythagorean Theorem
Complex Numbers
Line Segment
Trigonometric Functions
Numbers