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定理介紹：切線與半徑 | Tangent and Radius
Author:
Ricky LI
,
chisunch1
GeoGebra
New Resources
幾何作圖題：切三圓（題目）
美國國旗 (Codex, 2026.10.06)
美國國旗 (Claude 版)
伊朗國旗 (Codex╱2026.10.07)
長方體平面投影 (Codex版)
Discover Resources
Square pyramid
拿破崙三角形(費馬點)
gjc091b18 圓的割線
圓內一點
同頂角_2
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Angles
Scatter Plot
Addition
Distributions
Geometric Transformations