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30度直角三角形
Author:
郭勇
GeoGebra
New Resources
長方體平面投影 (Codex版)
三半圓間的相切圓(Codex╱2026.10.07)
找出對稱軸
Fibonacci Clock
國旗 (Claude 版)
Discover Resources
七巧板兔子12月坊
圓周
concurrence of medians and bimedians of tetrahedron
包含除法（1 ÷分數）的副本
环形跑道问题案例的制作
Discover Topics
Cosine
Limits
Polygons
Isosceles Triangles
Binomial Distribution