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梯形面积2
Author:
杨华
GeoGebra
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第八周作业3
科赫雪花
平行線的判定
撒针估算面积实验
比較五件物件的重量
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根據百分率找數量(二): 例1
空間多面體外接球 切平面
密鋪7
測試繪本
任意四边形各边中点的连线必构成平行四边形.许兴华数学
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Linear Equations
Reflection
Definite Integral
Triangles
Symmetry