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同旁內角---垂直平行綫
Author:
chanfushun
GeoGebra
New Resources
世界平面地圖 (Codex╱2026.10.07)
國旗 (作圖步驟直接餵給 Claude)
美國國旗 (Codex, 2026.10.06)
畫出對稱圖形
幾何作圖題：切三圓（題目）
Discover Resources
固定面積的圖形的周界變化
認識函數圖形
高中二年級平面向量的副本
〃One〃
繪畫四邊形
Discover Topics
Curve Sketching
Parallelogram
Straight Lines
Statistics
Equilateral Triangles