Blog rules 门规

Please observe the 3 Rs when you are blogging.

Respect--Please respect all user and readers.
Responsibility--You must take responsibiity for what you say.
Readability--Please write in English which is sensible and readable!
请尊重所有使用者和其他读者。
己所不欲，勿施于人。


Thursday, April 29, 2010

Pythagoras theorem.

This video is for 3N1 and all other students who are interested.
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