# Intro Tl;dr, the law of sines is: $$ \frac{\sin(\alpha)}{a} = \frac{\sin(\beta)}{b} = \frac{\sin(\gamma)}{c} $$ - Any triangle that is *not a right triangle* is called an oblique triangle. There are two types of oblique triangles: - **Acute triangles**: This is an oblique triangle where all three interior angles are less than $90\degree$ or $\dfrac{\pi}{2}$ radians. - **Obtuse Triangle**: This is an oblique triangle where one of the interior angles is greater than $90\degree$.