[b]（2013年3月4日更新）
[/b]展示如何在方格紙上畫各種四邊形。
English version: [url]22222 Drawing quadrilaterals on the grid or the pinboard[/url]
柯志明
香港 GeoGebra 學院
- Target Group (Age)
- 6 – 10
- Language
- Chinese Traditional / 繁體中文
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