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三角形内角和
Author:
谢鹏
GeoGebra
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算柱 (兩位數)
四邊形的特性
【案例】2018年全国1卷理科12题
兩位數除以一位數（二）
畫出對稱圖形
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兩正弦波的合成波
複合圖形(七)
正五角柱展開
範例二
justin sin
Discover Topics
Linear Equations
Integers
Tangent Function
Confidence Interval
Fractal Geometry