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波的干涉 Wave Interference
Author:
W.L. Wong, Albert
GeoGebra
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第八周作业
拼砌四邊形
球体的体积推导（优化版）
判斷球體
兩位數加法
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test03繪本用
翻轉方塊(單開)
-(√3/2)³ ≤ sinα sinβ sinγ ≤ (√3/2)³
數播線上201802
平移練習
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Constructions
Sphere
Function Graph
Sine
Percentages