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探究圓周與直徑的關係
拖拉綠點到適當位置，量度圓的直徑。
拖拉紅色的P點，將圓周拉直。透過細分刻度，量度圓周至[b]小數後兩個位[/b]。如有需要，可使用放大、縮小及移動工具。
將直徑分別改為 2 cm、3 cm 及其他數值，把直徑及量度出的圓周長度填在下表中。你有甚麼發現？