Discovering Pythagoras' Theorem by Area 發現畢氏定理

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Chinese version

What is the area of the shaded square? What do you discover?

http://www.geogebratube.org/material/show/id/503 (Download GeoGebra file)

著色正方形的面積是多少？你有甚麼發現？

http://www.geogebratube.org/material/show/id/574 (Download GeoGebra file)

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