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立方體的截平面
Author:
詠甯
GeoGebra
New Resources
Earth with coastline
世界平面地圖 (Codex╱2026.10.07)
幾何作圖題：切三圓（題目）
美國國旗 (Codex, 2026.10.06)
三半圓間的相切圓(Codex╱2026.10.07)
Discover Resources
卡特蘭數 (Catalan Number)
等邊三角形
Ex5C#3
雪櫃裏的食物
給三角形, 求以三頂點為圓心, 作三個外切圓
Discover Topics
Optimization Problems
Vectors
Centroid or Barycenter
Logarithm
Trapezoid