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九點圓
Author:
午安你好啊~~
九點圓
GeoGebra
New Resources
Nested spiral octagon
國旗 (作圖步驟直接餵給 Claude)
算柱 (兩位數)
幾何作圖題：切三圓（題目）
三半圓間的相切圓(Codex╱2026.10.07)
Discover Resources
waaachen
No.2
對頂角_1
Copy of 圓的面積
一次函数 二次函数 三角函数
Discover Topics
Trigonometry
Kite
Straight Lines
Binomial Distribution
Unit Circle