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蝴蝶定理推廣證明2(交比)
Author:
連琨銘
GeoGebra
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四邊形的特性
Nested spiral octagon
兩組對邊相等的四邊形
小数 的副本
近似值：有效數字
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圖四
-3/2 ≤ cosα + cosβ + cosγ ≤ 3
軌跡 直線 (與兩平行線等距)
外心
俄罗斯方块
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Numbers
Variance
Constructions
Linear Functions
Pyramid