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平行四邊形面積一
Author:
youzhen shih
Topic:
Area
GeoGebra
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圓的基本性質
科赫雪花
异形操场
撒针估算面积实验
直線的斜率：水平變化 & 鉛垂變化
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分段移動
累積頻數多邊形
圓周率的應用 題B
酷狗音乐
翰林數學_2下_CH3-1_三角形的內角和
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Probability
Parametric Curves
Median Value
Trigonometry
Median Line