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ptcc trigo level 2
Author:
Cheung Wing Chuen
GeoGebra
New Resources
三半圓間的相切圓(Codex╱2026.10.07)
近似值：有效數字
Nested spiral octagon
國旗 (Claude 版)
世界平面地圖 (Codex╱2026.10.07)
Discover Resources
圓和弦圓和弦
立體錯覺樓梯(使用透視法會稍有差距)
共頂點、底共線
P.4 對稱
黃金矩形與複數級數
Discover Topics
Logarithm
Functions
Rectangle
Special Points
Statistics