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三角形面積.Area of Triangle
Author:
harryau
Area of triangle. 三角形面積.
GeoGebra
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平行線的斜率
漂亮的摇摆曲线
第八周作业
讀磅
球体的体积推导
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圓柱體表面面積
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图形的旋转
折扣 例2的副本
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Rational Numbers
Bar Chart or Bar Graph
Difference and Slope
Geometric Transformations
Coordinates