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蝴蝶定理證明1：Steven構造恒等式
Author:
連琨銘
GeoGebra
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【案例】2013年安徽高考15题
兩組對邊相等的四邊形
異分母分數減法
拼砌四邊形
畫出對稱圖形
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平行線的性質
o'clcok
mjnsl8ba-數列級數圖形
螢橋國中 陳虹璇
EARTH01
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Integers
Secant Line or Secant
Cuboid
Variance
Pyramid