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內外角平分線的副本
Author:
Niehanyu
,
羅驥韡 (Pegasus Roe)
角平分點（圖中 C 點）會形成一個圓
GeoGebra
New Resources
Nested spiral octagon
伊朗國旗 (Codex╱2026.10.07)
中華民國國旗 (Codex╱2026.10.06)
sanjiaohanshu
四邊形的特性
Discover Resources
卡特蘭數 (Catalan Number)
圖D
橢圓拋物面1
地球－完整球面
sintx
Discover Topics
Vectors 2D (Two-Dimensional)
Addition
Isosceles Triangles
Parametric Curves
Intersection