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三角形面積公式A
Author:
maths324324
GeoGebra
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兩組對邊相等和有直角的四邊形
異分母分數減法
画直线等分三角形的面积
四邉形 (四年級) 教師版
畫出對稱圖形
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簡單動畫
七巧板
test
gjh-h01-01 畢氏數三角形
測試繪本
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Natural Numbers
Multiplication
Polynomial Functions
Diagrams
Histogram