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六上：圆的面积公式推导
Author:
钟秀群
Topic:
Circle
GeoGebra
New Resources
算柱 (兩位數)
判斷球體
異分母分數減法
兩位數加法
四邊形的特性
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以電子學習照顧數學科學習差異
較複雜的周界問題(二)
兩圓內外公切線
GGB DAY3
面積題 B
Discover Topics
Cosine
Trigonometric Functions
Geometry
Area
Fractal Geometry