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數學傳播39卷4期, 平面幾何公式思考
Author:
Yu-Tuan Lin
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伊朗國旗 (Codex╱2026.10.07)
中華民國國旗 (Codex╱2026.10.06)
長方體平面投影 (Codex版)
sanjiaohanshu
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