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正三角形堆垛
Author:
施奕瑄
GeoGebra
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異分母分數減法
畫出對稱圖形
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
找出對稱軸
Discover Resources
testssss
旋轉的概念
day01_03
黎曼和
翰林數學_2下_CH3-1_三角形的內角與外角
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Continuity
Hyperbola
Curve Sketching
Trigonometric Functions
Matrices