【第六百四十八課,圓的面積公式是怎麼來的�?� 國中的時候��就學過:圓的面積公式是π.r^2,但這個公式並不如矩形或是三角形面積公式那樣直觀 Template




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tomski【第六百四十八課,圓的面積公式是怎麼來的�?� 國中的時候��就學過:圓的面積公式是π.r^2,但這個公式並不如矩形或是三角形面積公式那樣直觀 coloring