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封閉區域著色
Author:
侯杰材
GeoGebra
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兩組對邊相等和有直角的四邊形
sanjiaohanshu
拼砌四邊形
算柱 (兩位數)
美國國旗 (Codex 版)
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Dizzy (Just for Fun)
pentagon
银币
雙曲線的漸近線
翰林數學_2下_CH3-1_多邊形的外角和
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Constructions
Ellipse
Optimization Problems
Power Functions
Circle