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鏡射
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1041051 陳柏維
GeoGebra
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近似值：有效數字
四邊形的特性
畫出對稱圖形
三位數除以一位數（一）
判斷球體
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Triangular Number 三角形數
除法運算
proof 49 黃彥淇
廣義三角：sin, cos
比例中的定值問題(一)
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Inequalities
Square
Function Graph
Addition
Trigonometry