Recent content by Sawarnik

No, the formula named is wrong, which is problematic. And I had already sent a message to them, but there has been no corrections! - - - Updated - - - But you can correct errors in Wiki with no prob. The MathWorld team however never listens to any suggestion and the mistake remain mistakes...

Seriously? Look carefully. It is Bretschneider's formula - Wikipedia, the free encyclopedia.

"and Brahmagupta's formula for the area of a quadrilateral:" Is the formula after that Brahmagupta's!

Thanks :)

One that I found recently: Semiperimeter -- from Wolfram MathWorld

600*sqrt{1-a^2/400}=578-a^2/2 Shorter and elegant tricks would be welcome!

Yeah, right. An awful lot of mistakes. I once tried that send message and sent the error and correction but no one looked at it, and remains incorrect today as well, and so I think its useless. In fact, I think Wikipedia is less error-prone than Mathworld.