Обсуждение:Ora

[math]\displaystyle{ x = \frac{-b\pm\sqrt{b^2-4ac}}{2a} }[/math]

Law of Sines:

[math]\displaystyle{ \frac{\sin A}{a}=\frac{\sin B}{b}=\frac{\sin C}{c} }[/math]

The Law of Sines relates each side length of any triangle to its opposite angle by using sines.

Distance

[math]\displaystyle{ d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} }[/math]