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Author:
陳允杰
GeoGebra
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拼砌四邊形
兩組對邊相等的四邊形
【案例】2018年全国1卷理科12题
柱體建築師
兩位數除以一位數（二）
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math test
正餘弦函數的疊合之二102.11.29
四邊形
(007)80102
三角形
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Circumcircle or Circumscribed Circle
Logarithm
Integers
Means
Set Theory