07:4307:43, 15 December 2007diffhist+85
Triangle
I added a theorem which is widely used in Chinese mathematics textbooks. I didn't learn English well so there may be grammar mistakes. If so, please correct them.
07:4307:43, 15 December 2007diffhist+85
Triangle
I added a theorem which is widely used in Chinese mathematics textbooks. I didn't learn English well so there may be grammar mistakes. If so, please correct them.