Area of Circles(1) 圓的面積(一)

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)

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中文版 English version

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)

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