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勾股定理III (修改)
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地球儀
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變化圖形製作
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地球儀繪製
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半角公式R.J. 沃克(R.J. Walker)
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二倍角公式證明
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勾股定理III 基於歐基里德(Euclid)的證明
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平方求和V 庄皮春 (Pi-Chun Chuang)
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伽利略比值II (Alfinio Flores & Hugh A. San…
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調和平均數、算術平均數、幾何平均數、平方平均數之間的不等式
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交錯級數(Roger B. Nelsen)
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內含正方形的正方形
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