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-3/2 ≤ cosα + cosβ + cosγ ≤ 3
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
前提:α + β + γ = 0
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球体的体积推导
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基測試題五邊形滾動
Triangle
蜘蛛網製作
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Median Value
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