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蝴蝶定理推廣證明1
Author:
連琨銘
GeoGebra
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兩組對邊相等的四邊形
三位數除以一位數（二）
畫出對稱圖形
異分母分數減法
四邊形的特性
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第三冊
Conjecture (Tropical Hoehn's Conjecture)
因式分解(十字相乘法)
congruent (SSS) 2
反演 (Inversion)的副本
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Line Segment
Rational Numbers
Arithmetic Mean
Confidence Interval
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