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三角形三邊上各一點最小周長
Author:
連琨銘
GeoGebra
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找出對稱軸
判斷球體
異分母分數減法
三位數除以一位數（一）
兩組對邊相等和有直角的四邊形
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Relationships among 3 Circle Theorems 三個圓定理的關係
单晨答空间曲面
商高定理\水2的副本
時距計算機 (時針改變)
加减乘除运算出题器
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Equations
Translation
Intersection
Expected Value
Fractions