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congruent (AAA) 2
Author:
Ricky Chan
GeoGebra
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拼砌四邊形
找出對稱軸
直角坐標平面上的旋轉變換
錐體建築師
算柱 (兩位數)
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waaachen
等腰，角度关系
學資p.14第9題
maths1
蝴蝶定理（唐老师的课程）
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Sphere
Hypothesis Testing
Line Segment
Differential Equation
Hyperbola