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週長面積皆相等的不全等三角形
Author:
陳隆期
GeoGebra
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撒针估算面积实验
直線的斜率
盈利與虧蝕
祖冲之的期望：内棋与外棋
直線的斜率：水平變化 & 鉛垂變化
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圖一
正多邊形收斂
向量的線性組合
P53_3a
tytyty
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Division
Reflection
Trigonometry
Plane Figures or Shapes