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平行四邊形變奏曲III
Author:
周桂名
Topic:
Parallelogram
移動C點 在固定長度下觀察,平行四邊形角度的變化。 如果是菱形,又有何不同?
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兩組對邊相等的四邊形
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正整數的指數律練習
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凸透镜成像
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