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三節棍問題
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Template: Symmetry04
練習_對稱
错觉平行线
宋小喵第6个作品
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七巧板奔人3
設備設計
固定邊長之長方形的特定內接平行四邊形面積
周界4B (1)
If指令的應用1
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Pythagoras or Pythagorean Theorem
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