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正n邊形內接縮小正n邊形
Author:
許清惟
GeoGebra
New Resources
畫出對稱圖形
國旗 (Claude 版)
美國國旗 (Codex 版)
幾何作圖題:切三圓(題目)
中華民國國旗 (Codex╱2026.10.06)
Discover Resources
三角形外心
交集与并集的动态展示
Circle123456789987654321
任何三角形內角和180度(五上數翰4-2)
面積趣味題
Discover Topics
Arithmetic Operations
Matrices
Geometric Mean
Probability
Subtraction