English version: http://www.geogebratube.org/material/show/id/279 (Download GeoGebra file)
Chinese version: http://www.geogebratube.org/material/show/id/550 (Download GeoGebra file)
教育局絧上學與教支援 Web-based Learning and Teaching Support
What is the area of a circle? Explore with the following applet.
http://www.geogebratube.org/material/show/id/279 (Download GeoGebra file)
圓形的面積是多少?利用以下軟件探究圓形面積的公式。
http://www.geogebratube.org/material/show/id/550 (Download GeoGebra file)