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平行四邊形_小
Author:
keihin
GeoGebra
New Resources
直線的斜率：水平變化 & 鉛垂變化
第八周作业3
异形操场
正方形雪花图案
撒针估算面积实验
Discover Resources
math
三角函數圖形
四角柱(底面為可調整梯形)
學習活動七頂點法
三角形的心
Discover Topics
Tangent Function
Cone
Upper and Lower Sum or Riemann Sum
Plane Figures or Shapes
Equations