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三角形外心
Author:
Chang Hui Fang
GeoGebra
New Resources
美國國旗 (Codex 版)
幾何作圖題：切三圓（題目）
算柱 (兩位數)
長方體平面投影 (Codex版)
世界平面地圖 (Codex╱2026.10.07)
Discover Resources
三角形內角和
proof 64 潘研
矩形
七角柱(可側轉、上下轉)
新课标例86 箱线图与百分位数
Discover Topics
Prism
Interest Calculation
Equilateral Triangles
Median Value
Tangent Function