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九點圓
Author:
午安你好啊~~
九點圓
GeoGebra
New Resources
算柱 (兩位數)
小数 的副本
世界平面地圖 (Codex╱2026.10.07)
幾何作圖題：切三圓（題目）
中華民國國旗 (Codex╱2026.10.06)
Discover Resources
類正五邊形摺法
angle at centre vs angle at circumference
All in one (centres of triangle)
三節棍問題
奠基
Discover Topics
Tree Diagrams
Rotation
Similarity Transformation or Similarity
Circumcircle or Circumscribed Circle
Root